{"title":"OEM Drivetrain","description":"\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003eOEM Drivetrain Components: Gears \u0026amp; Shafts, Bearings, Synchronizers, Gaskets \u0026amp; Seals, Clutch \u0026amp; Flywheel, Hardware, and Other Parts\u003c\/p\u003e","products":[{"product_id":"transfer-dirve-bearing-6mt","title":"Transfer Drive Bearing 6MT","description":"\u003cp\u003eBall bearing with 4-bolt flange.  Bolts to rear of extension housing.  For 6-speed TY856 applications.\u003c\/p\u003e\n\u003cp\u003eThis bearing is the one that most commonly fails on the STI 6MT.  Always replace if the bearing feels rough or is noisy.  This bearing presses on to the transfer drive gear and is secured with snap ring.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eManufacturer Part No: \u003c\/strong\u003e806245030\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat it fits:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSTI MY01-21\u003c\/li\u003e\n\u003cli\u003eLegacy Spec B MY05-09 (6MT TY856)\u003c\/li\u003e\n\u003cli\u003eForester STI MY04-07\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Subaru Genuine","offers":[{"title":"Default Title","offer_id":43639077765174,"sku":"RSTR-1224B","price":94.51,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0655\/5143\/3782\/files\/rstr1224b_a53ebecf-a042-4389-bdd3-5418ac4feb04.jpg?v=1756670921"},{"product_id":"final-drive-gear-set-r180","title":"Final Drive Gear Set R180","description":"\u003cp\u003eFinal drive gears, also known as ring \u0026amp; pinion set or crown wheel \u0026amp; pinion (CWP).  For Subaru R180 applications (180mm ring gear OD).  Ring and pinion gears are a matched set.  Professional installation is required for best results.  Setting the correct pinion depth, backlash, and bearing preloads is essential for maximum life expectancy and minimal noise.\u003c\/p\u003e\n\u003cp\u003eSelect appropriate rear diff ratio.  Ratio must match front ratio and transfer ratio otherwise center diff failure may occur.  3.90 must be used with 3.90 front ratio and 1.0 transfer ratio, 4.44 must be used with 4.44 front ratio and 1.0 transfer, 3.54 must be used with 3.90 front ratio and 1.1 transfer ratio. \u003c\/p\u003e\n\u003cp\u003eAvailable with optional REM ISF\u003cspan\u003e© treatment.  ISF (superfinishing) improves strength and reliability by significantly reducing the surface roughness in order to eliminate stress raisers on the surface, lower operating friction, and improve tooth contact.  Selecting this option may add up to a week to the delivery time.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eManufacturer Part Nos: \u003c\/strong\u003e38104AA270 (3.54), 38104AA260 (3.90), 38104AA080 (4.44)\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat it fits:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSTI MY06-21 (3.54 Ratio Standard)\u003c\/li\u003e\n\u003cli\u003eSTI MY01-05 (USDM \u0026amp; JDM 3.90 Ratio Standard, UK \u0026amp; Some Markets 3.54)\u003c\/li\u003e\n\u003cli\u003eGC8 STI Type R\/RA (4.44 Ratio Standard)\u003c\/li\u003e\n\u003cli\u003eLegacy Spec B 6MT or S401\/S402 (3.54 or 3.90 depending on year and market)\u003c\/li\u003e\n\u003cli\u003eForester STI 6MT (3.90 Ratio Standard)\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Subaru Genuine","offers":[{"title":"Ratio 4.44 \/ No","offer_id":43734894215222,"sku":"RST-1957","price":690.23,"currency_code":"USD","in_stock":true},{"title":"Ratio 4.44 \/ Yes (+$125)","offer_id":43734894247990,"sku":"RST-1957-REM","price":815.23,"currency_code":"USD","in_stock":true},{"title":"Ratio 3.90 \/ No","offer_id":43734894280758,"sku":"RST-1958C","price":796.87,"currency_code":"USD","in_stock":true},{"title":"Ratio 3.90 \/ Yes (+$125)","offer_id":43734894313526,"sku":"RST-1958C-REM","price":921.87,"currency_code":"USD","in_stock":true},{"title":"Ratio 3.54 \/ No","offer_id":43734894346294,"sku":"RST-1970","price":660.09,"currency_code":"USD","in_stock":true},{"title":"Ratio 3.54 \/ Yes (+$125)","offer_id":43734894379062,"sku":"RST-1970-REM","price":785.09,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0655\/5143\/3782\/files\/rst1970.jpg?v=1770481929"},{"product_id":"1st-driven-gear-6mt-ratio-3-636","title":"1st Driven Gear TY856 6MT Ratio 3.636","description":"\u003cp\u003e1st driven gear for 6-speed manual transmissions with trans ID codes starting with \"TY856\".  Order based on specific application.\u003c\/p\u003e\n\u003cp\u003eOptional REM ISF© (superfinishing) treatment.  ISF is a precisely controlled treatment that reduces surface roughness left from the machining processes thereby improving reliability, reducing friction, and all but eliminating break-in requirements and the resulting swarf.  Ideally, we recommend treating both contacting gears (drive \u0026amp; driven sides) for optimal results.  Adding ISF processing may increase ship time by as much as a week.\u003c\/p\u003e\n\u003cp\u003eGears may need to be replaced due to gear tooth failure or damage to synchronizer dog teeth.  The peaks of the synchro dog teeth should be sharp and without any noticeable burrs.  Damaged synchro dog teeth due to gear clash or missed shifts will reduce the shift performance and severe damage can cause gear lockout or prevent gear disengagement.\u003c\/p\u003e\n\u003cp\u003eOther possible sources of gear failure are overheating due to lack of oil supply, damage to bearing race surface resulting from bearing failure, or thrust surface wear due to heavy loading and\/or lack of lubrication.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGear Ratio:\u003c\/strong\u003e 3.636\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTooth Count: \u003c\/strong\u003e40\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eManufacturer Part Nos:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e32231AB390 (STI MY08-21)\u003c\/li\u003e\n\u003cli\u003e32231AB270 (STI MY07 \u0026amp; Forester STI) .... used for MY01-06 (Forester STI MY04-05) with updated parts\u003c\/li\u003e\n\u003cli\u003e32231AB280 (Legacy Spec B)\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Subaru Genuine","offers":[{"title":"STI MY08-21 6MT \/ No","offer_id":43639077929014,"sku":"RSTR-GC21","price":184.62,"currency_code":"USD","in_stock":true},{"title":"STI MY08-21 6MT \/ Yes (+$65)","offer_id":43963730231350,"sku":"RSTR-GC21-REM","price":249.62,"currency_code":"USD","in_stock":true},{"title":"STi MY07 6MT \/ No","offer_id":43734747414582,"sku":"RSTR-GC22","price":249.01,"currency_code":"USD","in_stock":true},{"title":"STi MY07 6MT \/ Yes (+$65)","offer_id":43963730264118,"sku":"RSTR-GC22-REM","price":314.01,"currency_code":"USD","in_stock":true},{"title":"Legacy Spec B 6MT \/ No","offer_id":43734747447350,"sku":"RSTR-GC23","price":236.26,"currency_code":"USD","in_stock":true},{"title":"Legacy Spec B 6MT \/ Yes (+$65)","offer_id":43963730296886,"sku":"RSTR-GC23-REM","price":301.26,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0655\/5143\/3782\/files\/rstrgc21.jpg?v=1757197423"},{"product_id":"extension-housing-6mt","title":"Extension Housing 6MT","description":"\u003cp\u003eAluminum transmission extension housing.  This is the rear most housing of the transmission case.  It houses the center differential and transfer gears and contains the mechanism for the reverse lockout system and the seal for the gear selector rod.  The housing is sold as the basic casting without any attached or assembled parts.  To install this part requires purchasing or transferring the propshaft oil seal, oil deflector and locating pin, selector rod oil seal, reverse lockout assembly components, propshaft dust cover, transfer drive gear with flanged bearing. transfer driven gear rear bearing race and shim, and shifter stay bracket.\u003c\/p\u003e\n\u003cp\u003eIt is not uncommon for the transfer drive gear bearing to fail and consequently explode damaging or wearing through the extension housing requiring its replacement.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eManufacturer Part No: \u003c\/strong\u003e32130AA271\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat it fits: \u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSTI MY08-21\u003c\/li\u003e\n\u003cli\u003eSTI MY01-07 (NOTE: Updated part.  Subaru indicates additional parts must be updated at the same time.  However, our experience indicates that this part can be used directly in these earlier models.  Use your best judgement.)\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Subaru Genuine","offers":[{"title":"Default Title","offer_id":43639077994550,"sku":"RSTR-1212B","price":250.02,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0655\/5143\/3782\/files\/rstr1212b.jpg?v=1757197954"},{"product_id":"flywheel-sti-6mt","title":"Flywheel STI 6MT 12310AA410","description":"\u003cp\u003eSubaru 6-speed flywheel provides the friction surface for the clutch to transfer power from the engine to the transmission.  It also provides the rotational inertia required to smooth the engine power pulses and dampen the torsional vibrations. \u003c\/p\u003e\n\u003cp\u003eThe flywheel should always be replaced or resurfaced when changing the clutch.  Deep surface cracking or severe heat spotting may necessitate replacement over resurfacing.  Additionally, the flywheel includes the ring gear used by the starter motor to rotate the engine.   A damaged ring gear may result in starter issues.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eManufacturer Part No: \u003c\/strong\u003e12310AA410\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat it fits:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSTI MY01-21 (TY856 6-speed MT)\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Subaru Genuine","offers":[{"title":"Default Title","offer_id":43639078289462,"sku":"RST-0115","price":327.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0655\/5143\/3782\/files\/rst0115.jpg?v=1761321902"},{"product_id":"bolt-m10x40x20mm","title":"Bolt M10 x 40 x 20mm","description":"\u003cp\u003eM10 bolt used for timing belt toothed idler pulley as well as the STI 6-speed pitch mount bracket to the clutch housing.\u003c\/p\u003e\n\u003cp\u003eSold individually.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eManufacturer Part No.: \u003c\/strong\u003e800110240\u003c\/p\u003e","brand":"Subaru Genuine","offers":[{"title":"Default Title","offer_id":43822994980918,"sku":"RSTR-S021","price":1.51,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0655\/5143\/3782\/files\/rstrs021.jpg?v=1750550696"},{"product_id":"final-drive-gear-set-r160","title":"Final Drive Gear Set R160","description":"\u003cp\u003eFinal drive gears, also known as ring \u0026amp; pinion set or crown wheel \u0026amp; pinion (CWP).  For Subaru R160 applications (160mm ring gear OD).  Ring and pinion gears are a matched set.  Professional installation is required for best results.  Setting the correct pinion depth, backlash, and bearing preloads is essential for maximum life expectancy and minimal noise.\u003c\/p\u003e\n\u003cp\u003eSelect appropriate rear diff ratio.  Ratio must match front ratio and transfer ratio otherwise center diff failure may occur.  3.90 must be used with 3.90 front ratio and 1.0 transfer ratio, 4.44 must be used with 4.44 front ratio and 1.0 transfer, 4.11 must be used with 4.11 front ratio and 1.0 transfer ratio. \u003c\/p\u003e\n\u003cp\u003eAvailable with optional REM ISF\u003cspan\u003e© treatment.  ISF (superfinishing) improves strength and reliability by significantly reducing the surface roughness in order to eliminate stress raisers on the surface, lower operating friction, and improve tooth contact.  Selecting this option may add up to a week to the delivery time.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eManufacturer Part Nos: \u003c\/strong\u003e38104AA430 (3.90), 38104AA450 (4.11), 38104AA470 (4.44)\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat it fits:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eWRX MT MY08-14 (3.90 Ratio Standard)\u003c\/li\u003e\n\u003cli\u003eWRX MY15-21 (4.11 w\/ 5MT or 3.90 w\/ CVT)\u003c\/li\u003e\n\u003cli\u003eJDM WRX MY97-07 (4.44 Ratio Standard)\u003c\/li\u003e\n\u003cli\u003eJDM STI MY97-00 (4.44 Ratio Standard)\u003c\/li\u003e\n\u003cli\u003eForester XT MT MY04-08 (4.44 Ratio Standard)\u003c\/li\u003e\n\u003cli\u003eMany other applications\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Subaru Genuine","offers":[{"title":"Ratio 4.44 \/ No","offer_id":43954124095542,"sku":"RST-1956","price":754.1,"currency_code":"USD","in_stock":true},{"title":"Ratio 4.44 \/ Yes (+$125)","offer_id":43954124128310,"sku":"RST-1956-REM","price":879.1,"currency_code":"USD","in_stock":true},{"title":"Ratio 4.11 \/ No","offer_id":43954124161078,"sku":"RST-1955","price":785.4,"currency_code":"USD","in_stock":true},{"title":"Ratio 4.11 \/ Yes (+$125)","offer_id":43954124193846,"sku":"RST-1955-REM","price":910.4,"currency_code":"USD","in_stock":true},{"title":"Ratio 3.90 \/ No","offer_id":43954124226614,"sku":"RST-1954","price":717.01,"currency_code":"USD","in_stock":true},{"title":"Ratio 3.90 \/ Yes (+$125)","offer_id":43954124259382,"sku":"RST-1954-REM","price":842.01,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0655\/5143\/3782\/files\/rstr1956.jpg?v=1756565461"},{"product_id":"sti-6mt-front-final-drive-gear-set","title":"STI 6MT Front Final Drive Gear Set","description":"\u003cp\u003eFinal drive gears, also known as ring \u0026amp; pinion set or crown wheel \u0026amp; pinion (CWP).  Replacement set of front final drive gears for the TY856 6-speed manual transmission.  Supplied as a matched set that have been run in together by the manufacturer.  Requires specialized installation to properly set up pinion depth, backlash, and bearing preloads.\u003c\/p\u003e\n\u003cp\u003eThis is a 3.90 ratio set and is the only factory ratio used in the 6MT.  Can be used with 3.90 or 3.54 rear diff ratio depending on the transfer ratio (1.0 transfer gears w\/ 3.90 rear ratio or 1.1 transfer gears w\/ 3.54 rear ratio).\u003c\/p\u003e\n\u003cp\u003eAvailable with optional REM ISF\u003cspan\u003e© treatment.  ISF (superfinishing) improves strength and reliability by significantly reducing the surface roughness in order to eliminate stress raisers on the surface, lower operating friction, and improve tooth contact.  Selecting this option may add up to a week to the delivery time.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eManufacturer Part Nos: \u003c\/strong\u003e38100AB720\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat it fits:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSTI 6MT MY01-21\u003c\/li\u003e\n\u003cli\u003eLegacy Spec B 6MT MY07-09\u003c\/li\u003e\n\u003cli\u003eForester STI 6MT\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Subaru Genuine","offers":[{"title":"No","offer_id":44031327764534,"sku":"RSTR-GH10","price":569.4,"currency_code":"USD","in_stock":true},{"title":"Yes (+$140)","offer_id":44031327797302,"sku":"RSTR-GH10-REM","price":709.4,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0655\/5143\/3782\/files\/rstrgh10.jpg?v=1756532369"},{"product_id":"shift-forks-ty856-6mt","title":"Shift Forks TY856 6MT","description":"\u003cp\u003eReplacement aluminum shift forks.  The plastic contact pads on the forks tend to wear out when the transmission is shifted aggressively.  When worn out the shifting performance is reduced due to sloppiness in the fitment between the fork and sleeve.  Replacement of the shift forks is common during a transmission rebuild.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eManufacturer Part Nos;\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"padding-left: 40px;\"\u003e\u003cstrong\u003e1st\/2nd Fork - \u003c\/strong\u003e32804AA110 (Prior to Trans. #060061 Must Update Other Parts)\u003c\/p\u003e\n\u003cp style=\"padding-left: 40px;\"\u003e\u003cstrong\u003e3rd\/4th Fork -\u003c\/strong\u003e 32810AA260 (Prior to Trans. #060061 Must Update Sleeve \u0026amp; Hub)\u003cbr\u003e\u003c\/p\u003e\n\u003cp style=\"padding-left: 40px;\"\u003e\u003cstrong\u003e5th\/6th Fork - \u003c\/strong\u003e32940AA010\u003c\/p\u003e\n\u003cp style=\"padding-left: 40px;\"\u003e\u003cstrong\u003eReverse Fork - \u003c\/strong\u003e32941AA010\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat it fits:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSTI EJ257 MY04-21\u003c\/li\u003e\n\u003cli\u003eSTI EJ207 MY01-20\u003c\/li\u003e\n\u003cli\u003eLegacy Spec B TY856 6MT\u003c\/li\u003e\n\u003cli\u003eForester STI T856 6MT\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Subaru Genuine","offers":[{"title":"1st\/2nd","offer_id":43962351255606,"sku":"RSTR-1310C","price":59.62,"currency_code":"USD","in_stock":true},{"title":"3rd\/4th","offer_id":43962351288374,"sku":"RSTR-1311B","price":77.59,"currency_code":"USD","in_stock":true},{"title":"5th\/6th","offer_id":43962351321142,"sku":"RSTR-1312B","price":67.78,"currency_code":"USD","in_stock":true},{"title":"Reverse","offer_id":43962351353910,"sku":"RSTR-1313B","price":53.13,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0655\/5143\/3782\/files\/shiftforks.jpg?v=1756519118"},{"product_id":"reverse-idler-gear-ty856-6mt","title":"Reverse Idler Gear TY856 6MT","description":"\u003cp\u003eReverse idler gear of 4 hole type.  Early models (mid-MY06 and older) with 6 holes for engaging synchronizer cone must update the synchronizer to 32650AA170 at the same time.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eManufacturer Part No: \u003c\/strong\u003e32282AA150\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat it fits:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSTI EJ257 MY04-21\u003c\/li\u003e\n\u003cli\u003eSTI EJ207 MY01-20\u003c\/li\u003e\n\u003cli\u003eLegacy Spec B TY856 6MT\u003c\/li\u003e\n\u003cli\u003eForester STI T856 6MT\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Subaru Genuine","offers":[{"title":"Default Title","offer_id":43963674230838,"sku":"RSTR-1169B","price":90.58,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0655\/5143\/3782\/files\/rstr1169b.jpg?v=1756514903"},{"product_id":"reverse-gear-hub-assembly-ty856-6mt","title":"Reverse Sleeve \u0026 Gear Assembly TY856 6MT","description":"\u003cp\u003eReverse gear sleeve \u0026amp; 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driven sides) for optimal results.  Adding ISF processing may increase ship time by as much as a week.\u003c\/p\u003e\n\u003cp\u003eGears may need to be replaced due to gear tooth failure or damage to synchronizer dog teeth.  The peaks of the synchro dog teeth should be sharp and without any noticeable burrs.  Damaged synchro dog teeth due to gear clash or missed shifts will reduce the shift performance and severe damage can cause gear lockout or prevent gear disengagement.\u003c\/p\u003e\n\u003cp\u003eOther possible sources of gear failure are overheating due to lack of oil supply, damage to bearing race surface resulting from bearing failure, or thrust surface wear due to heavy loading and\/or lack of lubrication.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGear Ratio:\u003c\/strong\u003e 1.521\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTooth Count: \u003c\/strong\u003e23\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eManufacturer Part Nos:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e32275AA560 (USDM STI MY07-18, Forester STI) ... 4 hole gear type - MY01-06 requires updating synchronizer.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e32275AA590 (Legacy Spec B)\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Subaru Genuine","offers":[{"title":"STI \/ Forester STI \/ No","offer_id":43963746680886,"sku":"RSTR-1161C","price":106.27,"currency_code":"USD","in_stock":true},{"title":"STI \/ Forester STI \/ Yes (+$40)","offer_id":43963746713654,"sku":"RSTR-1161C-REM","price":146.27,"currency_code":"USD","in_stock":true},{"title":"Legacy Spec B \/ No","offer_id":43963765293110,"sku":"RSTR-GC41","price":100.58,"currency_code":"USD","in_stock":true},{"title":"Legacy Spec B \/ Yes (+$40)","offer_id":43963765325878,"sku":"RSTR-GC41-REM","price":140.58,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0655\/5143\/3782\/files\/rstr1161c.jpg?v=1756354242"},{"product_id":"3rd-drive-gear-ty856-6mt-ratio-1-591","title":"3rd Drive Gear TY856 6MT Ratio 1.591","description":"\u003cp\u003e3rd drive gear for 6-speed manual transmissions with trans ID codes starting with \"TY856\".  This is one of the two taller (longer) 3rd gear ratios used by Subaru and is for USDM STI MY19-21 (and MY18 RA).  Also used in some European market applications.\u003c\/p\u003e\n\u003cp\u003eOptional REM ISF© (superfinishing) treatment.  ISF is a precisely controlled treatment that reduces surface roughness left from the machining processes thereby improving reliability, reducing friction, and all but eliminating break-in requirements and the resulting swarf.  Ideally, we recommend treating both contacting gears (drive \u0026amp; driven sides) for optimal results.  Adding ISF processing may increase ship time by as much as a week.\u003c\/p\u003e\n\u003cp\u003eGears may need to be replaced due to gear tooth failure or damage to synchronizer dog teeth.  The peaks of the synchro dog teeth should be sharp and without any noticeable burrs.  Damaged synchro dog teeth due to gear clash or missed shifts will reduce the shift performance and severe damage can cause gear lockout or prevent gear disengagement.\u003c\/p\u003e\n\u003cp\u003eOther possible sources of gear failure are overheating due to lack of oil supply, damage to bearing race surface resulting from bearing failure, or thrust surface wear due to heavy loading and\/or lack of lubrication.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGear Ratio:\u003c\/strong\u003e 1.591\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTooth Count: \u003c\/strong\u003e22\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eManufacturer Part Nos:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e32275AA630 (USDM STI MY19-21)\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Subaru Genuine","offers":[{"title":"No","offer_id":43963773386806,"sku":"RSTR-GC42","price":147.55,"currency_code":"USD","in_stock":true},{"title":"Yes (+$40)","offer_id":43963773419574,"sku":"RSTR-GC42-REM","price":187.55,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0655\/5143\/3782\/files\/rstrgc42.jpg?v=1756352769"},{"product_id":"4th-drive-gear-ty856-6mt-ratio-1-346","title":"4th Drive Gear TY856 6MT Ratio 1.346","description":"\u003cp\u003e4th drive gear for 6-speed manual transmissions with trans ID codes starting with \"TY856\".  This is the shorter gear ratio of the two available options and was used on USDM STI MY04-06 and all JDM STI. \u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 0.875rem;\"\u003eOptional REM ISF© (superfinishing) treatment.  ISF is a precisely controlled treatment that reduces surface roughness left from the machining processes thereby improving reliability, reducing friction, and all but eliminating break-in requirements and the resulting swarf.  Ideally, we recommend treating both contacting gears (drive \u0026amp; driven sides) for optimal results.  Adding ISF processing may increase ship time by as much as a week.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eGears may need to be replaced due to gear tooth failure or damage to synchronizer dog teeth.  The peaks of the synchro dog teeth should be sharp and without any noticeable burrs.  Damaged synchro dog teeth due to gear clash or missed shifts will reduce the shift performance and severe damage can cause gear lockout or prevent gear disengagement.\u003c\/p\u003e\n\u003cp\u003eOther possible sources of gear failure are overheating due to lack of oil supply, damage to bearing race surface resulting from bearing failure, or thrust surface wear due to heavy loading and\/or lack of lubrication.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGear Ratio:\u003c\/strong\u003e 1.346\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTooth Count: \u003c\/strong\u003e26\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eManufacturer Part No:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e32276AA260 (USDM STI MY04-06, JDM STI MY01-20) ... Note V7 (MY01-02) must update 5th bearing race to 32378AA010\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Subaru Genuine","offers":[{"title":"No","offer_id":43963791999030,"sku":"RSTR-1162B","price":103.51,"currency_code":"USD","in_stock":true},{"title":"Yes (+$40)","offer_id":43963792031798,"sku":"RSTR-1162B-REM","price":143.51,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0655\/5143\/3782\/files\/rstr1162b_2.jpg?v=1756351801"},{"product_id":"4th-drive-gear-ty856-6mt-ratio-1-137","title":"4th Drive Gear TY856 6MT Ratio 1.137","description":"\u003cp\u003e4th drive gear for 6-speed manual transmissions with trans ID codes starting with \"TY856\".  This is the taller (longer) gear ratio of the two available options and was used on USDM STI MY07-21, Legacy Spec B, and Forester STI.  It is also used in our RST-F145Kit (2nd-6th longer ratio) gear set.\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 0.875rem;\"\u003eOptional REM ISF© (superfinishing) treatment.  ISF is a precisely controlled treatment that reduces surface roughness left from the machining processes thereby improving reliability, reducing friction, and all but eliminating break-in requirements and the resulting swarf.  Ideally, we recommend treating both contacting gears (drive \u0026amp; driven sides) for optimal results.  Adding ISF processing may increase ship time by as much as a week.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eGears may need to be replaced due to gear tooth failure or damage to synchronizer dog teeth.  The peaks of the synchro dog teeth should be sharp and without any noticeable burrs.  Damaged synchro dog teeth due to gear clash or missed shifts will reduce the shift performance and severe damage can cause gear lockout or prevent gear disengagement.\u003c\/p\u003e\n\u003cp\u003eOther possible sources of gear failure are overheating due to lack of oil supply, damage to bearing race surface resulting from bearing failure, or thrust surface wear due to heavy loading and\/or lack of lubrication.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGear Ratio:\u003c\/strong\u003e 1.137\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTooth Count: \u003c\/strong\u003e29\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eManufacturer Part No:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e32276AA270 (USDM STI MY07-21, Forester STI)\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e32276AA300 (Legacy Spec B)\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Subaru Genuine","offers":[{"title":"STI \/ Forester STI \/ No","offer_id":43963822800950,"sku":"RSTR-1162C","price":105.19,"currency_code":"USD","in_stock":true},{"title":"STI \/ Forester STI \/ Yes (+$40)","offer_id":43963822833718,"sku":"RSTR-1162C-REM","price":145.19,"currency_code":"USD","in_stock":true},{"title":"Legacy Spec B \/ No","offer_id":43963831255094,"sku":"RSTR-GC50","price":97.02,"currency_code":"USD","in_stock":true},{"title":"Legacy Spec B \/ Yes (+$40)","offer_id":43963831287862,"sku":"RSTR-GC50-REM","price":137.02,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0655\/5143\/3782\/files\/rstr1162c_2.jpg?v=1756350733"},{"product_id":"3rd-4th-driven-gear-cluster-ty856-6mt-ratio-1-761-1-346","title":"3rd\/4th Driven Gear Cluster TY856 6MT Ratio 1.761\/1.346","description":"\u003cp\u003e3rd\/4th driven gear for 6-speed manual transmissions with trans ID codes starting with \"TY856\".  Early models use a wide keyway (10mm wide) and later models use a narrow keyway (7mm wide).  We offer an adapter keyway to use a later narrow key gear cluster in a wide key application (available separately on our site) when necessary.\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 0.875rem;\"\u003eOptional REM ISF© (superfinishing) treatment.  ISF is a precisely controlled treatment that reduces surface roughness left from the machining processes thereby improving reliability, reducing friction, and all but eliminating break-in requirements and the resulting swarf.  Ideally, we recommend treating both contacting gears (drive \u0026amp; driven sides) for optimal results.  Adding ISF processing may increase ship time by as much as a week.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eGears may need to be replaced due to gear tooth failure or damage to synchronizer dog teeth.  The peaks of the synchro dog teeth should be sharp and without any noticeable burrs.  Damaged synchro dog teeth due to gear clash or missed shifts will reduce the shift performance and severe damage can cause gear lockout or prevent gear disengagement.\u003c\/p\u003e\n\u003cp\u003eOther possible sources of gear failure are overheating due to lack of oil supply, damage to bearing race surface resulting from bearing failure, or thrust surface wear due to heavy loading and\/or lack of lubrication.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGear Ratio:\u003c\/strong\u003e 1.761 (3rd) \/ 1.346 (4th)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTooth Count: \u003c\/strong\u003e37 \/ 35\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eManufacturer Part No:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e32254AA590 Narrow Key (JDM STI MY07-20)\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e32254AA460 Wide Key (STI MY04-06)\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Subaru Genuine","offers":[{"title":"Wide \/ No","offer_id":43963842527286,"sku":"RSTR-1167","price":273.64,"currency_code":"USD","in_stock":true},{"title":"Wide \/ Yes (+$70)","offer_id":43963842560054,"sku":"RSTR-1167-REM","price":343.64,"currency_code":"USD","in_stock":true},{"title":"Narrow \/ No","offer_id":43963842592822,"sku":"RSTR-GC60","price":186.84,"currency_code":"USD","in_stock":true},{"title":"Narrow \/ Yes (+$70)","offer_id":43963842625590,"sku":"RSTR-GC60-REM","price":256.84,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0655\/5143\/3782\/files\/rstr1167.jpg?v=1756349008"},{"product_id":"3rd-4th-driven-gear-cluster-ty856-6mt-ratio-1-521-1-137","title":"3rd\/4th Driven Gear Cluster TY856 6MT Ratio 1.521\/1.137","description":"\u003cp\u003e3rd\/4th driven gear for 6-speed manual transmissions with trans ID codes starting with \"TY856\".  Early models use a wide keyway (10mm wide) and later models use a narrow keyway (7mm wide).  This is used in our RST-F145Kit (2nd-6th long ratio) gear sets.  We offer an adapter keyway to use a later narrow key gear cluster in a wide key application (available separately on our site) when necessary.  \u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 0.875rem;\"\u003eOptional REM ISF© (superfinishing) treatment.  ISF is a precisely controlled treatment that reduces surface roughness left from the machining processes thereby improving reliability, reducing friction, and all but eliminating break-in requirements and the resulting swarf.  Ideally, we recommend treating both contacting gears (drive \u0026amp; driven sides) for optimal results.  Adding ISF processing may increase ship time by as much as a week.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eGears may need to be replaced due to gear tooth failure or damage to synchronizer dog teeth.  The peaks of the synchro dog teeth should be sharp and without any noticeable burrs.  Damaged synchro dog teeth due to gear clash or missed shifts will reduce the shift performance and severe damage can cause gear lockout or prevent gear disengagement.\u003c\/p\u003e\n\u003cp\u003eOther possible sources of gear failure are overheating due to lack of oil supply, damage to bearing race surface resulting from bearing failure, or thrust surface wear due to heavy loading and\/or lack of lubrication.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGear Ratio:\u003c\/strong\u003e 1.521 (3rd) \/ 1.137 (4th)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTooth Count: \u003c\/strong\u003e35 \/ 33\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eManufacturer Part No:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e32254AA600 Narrow Key (USDM STI MY07-18, Forester STI MY07)\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e32254AA540 Wide Key (Forester STI MY04-06)\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Subaru Genuine","offers":[{"title":"Narrow \/ No","offer_id":43963886829622,"sku":"RSTR-1167C","price":235.5,"currency_code":"USD","in_stock":true},{"title":"Narrow \/ Yes (+$70)","offer_id":43963886862390,"sku":"RSTR-1167C-REM","price":305.5,"currency_code":"USD","in_stock":true},{"title":"Wide \/ No","offer_id":43963886764086,"sku":"RSTR-1166CX","price":235.59,"currency_code":"USD","in_stock":true},{"title":"Wide \/ Yes (+$70)","offer_id":43963886796854,"sku":"RSTR-1166CX-REM","price":305.59,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0655\/5143\/3782\/files\/rstr1166cx.jpg?v=1756346333"},{"product_id":"5th-6th-driven-gear-cluster-ty856-6mt-ratio-1-062-0-842","title":"5th\/6th Driven Gear Cluster TY856 6MT Ratio 1.062\/0.842","description":"\u003cp\u003e5th\/6th driven gear for 6-speed manual transmissions with trans ID codes starting with \"TY856\".  Early models use a wide keyway (10mm wide) and later models use a narrow keyway (7mm wide).  An adapter key to install the narrow key gear cluster on a wide key shaft is available separately on this website.  This gear is for JDM close (short) ratio 5th\/6th applications.\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 0.875rem;\"\u003eOptional REM ISF© (superfinishing) treatment.  ISF is a precisely controlled treatment that reduces surface roughness left from the machining processes thereby improving reliability, reducing friction, and all but eliminating break-in requirements and the resulting swarf.  Ideally, we recommend treating both contacting gears (drive \u0026amp; driven sides) for optimal results.  Adding ISF processing may increase ship time by as much as a week.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eGears may need to be replaced due to gear tooth failure or damage to synchronizer dog teeth.  The peaks of the synchro dog teeth should be sharp and without any noticeable burrs.  Damaged synchro dog teeth due to gear clash or missed shifts will reduce the shift performance and severe damage can cause gear lockout or prevent gear disengagement.\u003c\/p\u003e\n\u003cp\u003eOther possible sources of gear failure are overheating due to lack of oil supply, damage to bearing race surface resulting from bearing failure, or thrust surface wear due to heavy loading and\/or lack of lubrication.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGear Ratio:\u003c\/strong\u003e 1.062 (5th) \/ 0.842 (6th)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTooth Count: \u003c\/strong\u003e34 \/ 32\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eManufacturer Part No:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e32364AA050 Narrow Key (JDM STI MY01-20) ... adapter key required for MY01-06\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Subaru Genuine","offers":[{"title":"No","offer_id":43963923562550,"sku":"RSTR-GC90","price":248.4,"currency_code":"USD","in_stock":true},{"title":"Yes (+$70)","offer_id":43963923595318,"sku":"RSTR-GC90-REM","price":318.4,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0655\/5143\/3782\/files\/rstrgc90_a135d9a3-77a9-40c9-b6f8-fc4385938609.jpg?v=1756343174"},{"product_id":"5th-6th-driven-gear-cluster-ty856-6mt-ratio-0-891-0-707","title":"5th\/6th Driven Gear Cluster TY856 6MT Ratio 0.891\/0.707","description":"\u003cp\u003e5th\/6th driven gear for 6-speed manual transmissions with trans ID codes starting with \"TY856\".  Early models use a wide keyway (10mm wide) and later models use a narrow keyway (7mm wide).  An adapter key to install the narrow key gear cluster on a wide key shaft is available separately on this website.  This gear is for long ratio applications including our RST-F145Kit (2nd-6th) gear set.\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 0.875rem;\"\u003eOptional REM ISF© (superfinishing) treatment.  ISF is a precisely controlled treatment that reduces surface roughness left from the machining processes thereby improving reliability, reducing friction, and all but eliminating break-in requirements and the resulting swarf.  Ideally, we recommend treating both contacting gears (drive \u0026amp; driven sides) for optimal results.  Adding ISF processing may increase ship time by as much as a week.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eGears may need to be replaced due to gear tooth failure or damage to synchronizer dog teeth.  The peaks of the synchro dog teeth should be sharp and without any noticeable burrs.  Damaged synchro dog teeth due to gear clash or missed shifts will reduce the shift performance and severe damage can cause gear lockout or prevent gear disengagement.\u003c\/p\u003e\n\u003cp\u003eOther possible sources of gear failure are overheating due to lack of oil supply, damage to bearing race surface resulting from bearing failure, or thrust surface wear due to heavy loading and\/or lack of lubrication.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGear Ratio:\u003c\/strong\u003e 0.891 (5th) \/ 0.707 (6th)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTooth Count: \u003c\/strong\u003e33 \/ 29\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eManufacturer Part No:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e32364AA100 Narrow Key (Legacy Spec B)\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e32364AA*** Narrow Key (Forester STI) ... MY04-06 require adapter key\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Subaru Genuine","offers":[{"title":"Forester STI \/ No","offer_id":43963952594998,"sku":"RSTR-1168C","price":234.81,"currency_code":"USD","in_stock":true},{"title":"Forester STI \/ Yes (+$70)","offer_id":43963952627766,"sku":"RSTR-1168C-REM","price":304.81,"currency_code":"USD","in_stock":true},{"title":"Legacy Spec B \/ No","offer_id":43963969732662,"sku":"RSTR-GC94","price":281.64,"currency_code":"USD","in_stock":true},{"title":"Legacy Spec B \/ Yes (+$70)","offer_id":43963969765430,"sku":"RSTR-GC94-REM","price":351.64,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0655\/5143\/3782\/files\/rstr1168c.jpg?v=1756342936"},{"product_id":"5th-drive-gear-ty856-6mt-ratio-1-062","title":"5th Drive Gear TY856 6MT Ratio 1.062","description":"\u003cp\u003e5th drive gear for 6-speed manual transmissions with trans ID codes starting with \"TY856\".  This is for close ratio (short) 5th\/6th applications such as JDM STI.\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 0.875rem;\"\u003eOptional REM ISF© (superfinishing) treatment.  ISF is a precisely controlled treatment that reduces surface roughness left from the machining processes thereby improving reliability, reducing friction, and all but eliminating break-in requirements and the resulting swarf.  Ideally, we recommend treating both contacting gears (drive \u0026amp; driven sides) for optimal results.  Adding ISF processing may increase ship time by as much as a week.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eGears may need to be replaced due to gear tooth failure or damage to synchronizer dog teeth.  The peaks of the synchro dog teeth should be sharp and without any noticeable burrs.  Damaged synchro dog teeth due to gear clash or missed shifts will reduce the shift performance and severe damage can cause gear lockout or prevent gear disengagement.\u003c\/p\u003e\n\u003cp\u003eOther possible sources of gear failure are overheating due to lack of oil supply, damage to bearing race surface resulting from bearing failure, or thrust surface wear due to heavy loading and\/or lack of lubrication.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGear Ratio:\u003c\/strong\u003e 1.062\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTooth Count: \u003c\/strong\u003e32\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eManufacturer Part No:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e32341AA311 (JDM STI MY01-20)\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Subaru Genuine","offers":[{"title":"No","offer_id":43964058337334,"sku":"RSTR-1163","price":106.03,"currency_code":"USD","in_stock":true},{"title":"Yes (+$40)","offer_id":43964058370102,"sku":"RSTR-1163-REM","price":146.03,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0655\/5143\/3782\/files\/rstr1163.jpg?v=1756174084"},{"product_id":"5th-drive-gear-ty856-6mt-ratio-0-891","title":"5th Drive Gear TY856 6MT Ratio 0.891","description":"\u003cp\u003e5th drive gear for 6-speed manual transmissions with trans ID codes starting with \"TY856\".  This is for long (tall) ratio applications including our RST-F145Kit (2nd-6th long ratio) gear set.\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 0.875rem;\"\u003eOptional REM ISF© (superfinishing) treatment.  ISF is a precisely controlled treatment that reduces surface roughness left from the machining processes thereby improving reliability, reducing friction, and all but eliminating break-in requirements and the resulting swarf.  Ideally, we recommend treating both contacting gears (drive \u0026amp; driven sides) for optimal results.  Adding ISF processing may increase ship time by as much as a week.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eGears may need to be replaced due to gear tooth failure or damage to synchronizer dog teeth.  The peaks of the synchro dog teeth should be sharp and without any noticeable burrs.  Damaged synchro dog teeth due to gear clash or missed shifts will reduce the shift performance and severe damage can cause gear lockout or prevent gear disengagement.\u003c\/p\u003e\n\u003cp\u003eOther possible sources of gear failure are overheating due to lack of oil supply, damage to bearing race surface resulting from bearing failure, or thrust surface wear due to heavy loading and\/or lack of lubrication.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGear Ratio:\u003c\/strong\u003e 0.891\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTooth Count: \u003c\/strong\u003e37\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eManufacturer Part 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treatment that reduces surface roughness left from the machining processes thereby improving reliability, reducing friction, and all but eliminating break-in requirements and the resulting swarf.  Ideally, we recommend treating both contacting gears (drive \u0026amp; driven sides) for optimal results.  Adding ISF processing may increase ship time by as much as a week.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eGears may need to be replaced due to gear tooth failure or damage to synchronizer dog teeth.  The peaks of the synchro dog teeth should be sharp and without any noticeable burrs.  Damaged synchro dog teeth due to gear clash or missed shifts will reduce the shift performance and severe damage can cause gear lockout or prevent gear disengagement.\u003c\/p\u003e\n\u003cp\u003eOther possible sources of gear failure are overheating due to lack of oil supply, damage to bearing race surface resulting from bearing failure, or thrust surface wear due to heavy loading and\/or lack of lubrication.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGear Ratio:\u003c\/strong\u003e 0.707\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTooth Count: \u003c\/strong\u003e41\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eManufacturer Part No:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e32337AA*** (Forester STI)\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Subaru Genuine","offers":[{"title":"No","offer_id":43964100739126,"sku":"RSTR-1164C","price":159.7,"currency_code":"USD","in_stock":true},{"title":"Yes (+$50)","offer_id":43964100771894,"sku":"RSTR-1164C-REM","price":209.7,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0655\/5143\/3782\/files\/rstrgc81_2.jpg?v=1756338100"},{"product_id":"6th-drive-gear-ty856-6mt-ratio-0-842","title":"6th Drive Gear TY856 6MT Ratio 0.842","description":"\u003cp\u003e6th drive gear for 6-speed manual transmissions with trans ID codes starting with \"TY856\".  This is 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disengagement.\u003c\/p\u003e\n\u003cp\u003eOther possible sources of gear failure are overheating due to lack of oil supply, damage to bearing race surface resulting from bearing failure, or thrust surface wear due to heavy loading and\/or lack of lubrication.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGear Ratio:\u003c\/strong\u003e 0.842\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTooth Count: \u003c\/strong\u003e38\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eManufacturer Part No:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e32337AA011 (JDM STI MY01-20)\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Subaru Genuine","offers":[{"title":"No","offer_id":43964114206774,"sku":"RSTR-1164","price":199.75,"currency_code":"USD","in_stock":true},{"title":"Yes (+$50)","offer_id":43964114239542,"sku":"RSTR-1164-REM","price":249.75,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0655\/5143\/3782\/files\/rstr1164.jpg?v=1756174084"},{"product_id":"1st-gear-synchronizer-ty856-6mt","title":"1st Gear Synchronizer TY856 6MT GDB","description":"\u003cp\u003eSynchronizer for 1st gear on GDB applications.  This is a double cone synchronizer and either 6 (MY01-06) or 4 (MY07) raised tabs on the cone that engage the corresponding holes in the 1st driven gear.  Early (MY01-early MY04) applications require updating additional parts (see our synchro update kit).  Choose the correct synchro according to the number of holes in 1st gear.\u003c\/p\u003e\n\u003cp\u003eA worn synchronizer will result in a crunchy or grinding shift which may be more pronounced when the oil is warm.  Subaru transmissions are very finicky when it comes to gear oil selection.  Synchro performance and life is highly dependent on the characteristics of the oil. \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eManufacturer Part No: \u003c\/strong\u003e32650AA110 (6-tabs), 32650AA140 (4-tabs)\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat it fits:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSTI MY01-21\u003c\/li\u003e\n\u003cli\u003eForester STI MY04-07\u003c\/li\u003e\n\u003cli\u003eLegacy Spec B MY07-09\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Subaru Genuine","offers":[{"title":"6-Tab Double Cone","offer_id":43964199239734,"sku":"RSTR-1181","price":144.46,"currency_code":"USD","in_stock":true},{"title":"4-Tab Double Cone","offer_id":43964199272502,"sku":"RSTR-1181B","price":149.84,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0655\/5143\/3782\/files\/rstr1181_2.jpg?v=1756185407"},{"product_id":"1st-gear-synchronizer-ty856-6mt-my08","title":"1st Gear Synchronizer TY856 6MT 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synchronizer with 4 raised tabs on the cone that engage the corresponding holes in the 1st driven gear.  \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eManufacturer Part No: \u003c\/strong\u003e32650AA220\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat it fits:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSTI MY08-21\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Subaru Genuine","offers":[{"title":"Default Title","offer_id":43964235743286,"sku":"RSTR-GCB0","price":120.86,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0655\/5143\/3782\/files\/rstrgcb0_2.jpg?v=1756183706"},{"product_id":"2nd-gear-synchronizer-ty856-6mt-gdb","title":"2nd Gear Synchronizer TY856 6MT GDB","description":"\u003cp\u003eSynchronizer for 2nd gear on GDB applications.  This is a triple cone synchronizer and either 6 (MY01-06) or 4 (MY07) raised tabs on the cone that engage the corresponding holes in the 2nd driven gear.  Early (MY01-early MY04) applications require updating additional parts (see our synchro update kit).  Choose the correct synchro according to the number of holes in 2nd gear.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eManufacturer Part No: \u003c\/strong\u003e32650AA110 (6-tabs), 32650AA140 (4-tabs)\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat it fits:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eUSDM STI MY04-07\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eJDM STI Feb 28,2004-MY07\u003c\/li\u003e\n\u003cli\u003eJDM STI MY01-Feb 27,2004 ... must update related parts\u003c\/li\u003e\n\u003cli\u003eForester STI MY04-07\u003c\/li\u003e\n\u003cli\u003eLegacy Spec B MY07-09\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Subaru Genuine","offers":[{"title":"6-Tab Triple Cone","offer_id":43964242133046,"sku":"RSTR-1182","price":129.39,"currency_code":"USD","in_stock":true},{"title":"4-Tab Triple Cone","offer_id":43964242165814,"sku":"RSTR-1182B","price":159.11,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0655\/5143\/3782\/files\/rstr1182_2.jpg?v=1756183587"},{"product_id":"3rd-gear-synchronizer-ty856-6mt","title":"3rd Gear Synchronizer TY856 6MT","description":"\u003cp\u003eSynchronizer for 3rd gear.  This is a double cone synchronizer with either 6 raised tabs to engage matching holes in the gear or 4 tabs depending on the application.  6-tab synchos were used MY01-06 and 4-tab from MY07 onward.  However, due to parts updates on older models it is advised to check the gear and order accordingly.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eManufacturer Part No: \u003c\/strong\u003e32650AA081 (6-tabs), 32650AA160 (4-tabs)\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat it fits:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSTI 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on the characteristics of the oil. \u003c\/p\u003e\n\u003cp\u003eSold individually (Order one for each gear 4th, 5th, or 6th).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eManufacturer Part No: \u003c\/strong\u003e32614AA111\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat it fits:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSTI MY01-21\u003c\/li\u003e\n\u003cli\u003eForester STI MY04-07\u003c\/li\u003e\n\u003cli\u003eLegacy Spec B MY07-09\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Subaru Genuine","offers":[{"title":"Default Title","offer_id":43965501374518,"sku":"RSTR-1184","price":29.87,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0655\/5143\/3782\/files\/rstr1184.jpg?v=1756178241"},{"product_id":"carbon-baulk-ring-synchro-ty856-6mt","title":"Carbon Baulk Ring (Synchro) TY856 6MT","description":"\u003cp\u003eThis baulk ring is a single cone synchronizer used for 4th, 5th, 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Title","offer_id":43969450213430,"sku":"RSTR-1184C","price":56.77,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0655\/5143\/3782\/files\/rstr1184c.jpg?v=1756177111"},{"product_id":"transmission-oil-strainer-ty856-6mt","title":"Transmission Oil Strainer TY856 6MT","description":"\u003cp\u003eThe oil strainer is used on oil pump-equipped transmission applications (MY01-early MY07).  It serves as the oil pickup for the oil pump and its purpose is to strain out any debris of sufficient size as to cause damage or failure to the oil pump.  \u003c\/p\u003e\n\u003cp\u003eThis part may require replacement after a serious gear failure due to the difficulty in fully cleaning the metal debris out of the pickup screen area.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eManufacturer Part No: \u003c\/strong\u003e31728AA070\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat it 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lubrication.  \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eManufacturer Part No: \u003c\/strong\u003e31328AA081\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat it fits:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSTI MY01-07 (USDM early MY07 only)\u003c\/li\u003e\n\u003cli\u003eForester STI MY04-07\u003c\/li\u003e\n\u003cli\u003eLegacy Spec B MY06-07\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Subaru Genuine","offers":[{"title":"Default Title","offer_id":43969549271094,"sku":"RSTR-GBD1","price":490.12,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0655\/5143\/3782\/files\/rstrgbd1_3.jpg?v=1756775039"},{"product_id":"main-shat-ty856-6mt-ratio-long-ratio","title":"Main Shaft TY856 6MT Long Ratio","description":"\u003cp\u003eMain shaft (aka input shaft) for 6-speed manual transmissions with trans ID codes starting with \"TY856\".  This is for longer (taller) ratio applications 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that engineering expertise with their OEM replacement clutch kits conveniently packaged with everything you need to property replace your worn-out clutch. \u003cspan\u003eSuggested for stock and mildly modified vehicles requiring factory clutch engagement, smoothness, and pedal effort.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e Includes disc, pressure plate, release bearing, pilot bearing, and alignment tool.  This is a 230mm push type clutch.  \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eManufacturer Part No:\u003c\/strong\u003e FJK1004\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat it fits:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eLegacy\/Outback Non-Turbo 6MT MY10-14\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eForester Non-Turbo 6MT MY14-18\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Exedy","offers":[{"title":"Default Title","offer_id":44009280208950,"sku":"EX-FJK1004","price":302.06,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0655\/5143\/3782\/files\/fjk1004.jpg?v=1755359032"},{"product_id":"exedy-oem-clutch-brz-zc","title":"Exedy OEM Clutch BRZ ZC","description":"\u003cp\u003eExedy has been the original equipment supplier to Subaru for most of their clutches over the years.  You can rely on that engineering expertise with their OEM replacement clutch kits conveniently packaged with everything you need to property replace your worn-out clutch. \u003cspan\u003eSuggested for stock and mildly modified vehicles requiring factory clutch engagement, smoothness, and pedal effort.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e Includes disc, pressure plate, release bearing, pilot bearing, and alignment tool.  This is a 230mm push type clutch.  \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eManufacturer Part No:\u003c\/strong\u003e FJK1005\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat it fits:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBRZ MY13-21\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Exedy","offers":[{"title":"Default Title","offer_id":44009288532022,"sku":"EX-FJK1005","price":287.39,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0655\/5143\/3782\/files\/fjk1005.jpg?v=1755359719"},{"product_id":"exedy-oem-clutch-wrx-my18-21","title":"Exedy OEM Clutch WRX MY18-21","description":"\u003cp\u003eExedy has been the original equipment supplier to Subaru for most of their clutches over the years.  You can rely on that engineering expertise with their OEM replacement clutch kits conveniently packaged with everything you need to property replace your worn-out clutch. \u003cspan\u003eSuggested for stock and mildly modified vehicles requiring factory clutch engagement, smoothness, and pedal effort.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e Includes disc, pressure plate, release bearing, pilot bearing, and alignment tool.  This is a 240mm push type clutch.  \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eManufacturer Part No: \u003c\/strong\u003eKSB03\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat it fits:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eWRX 6MT MY18-21\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Exedy","offers":[{"title":"Default Title","offer_id":44009309569078,"sku":"EX-FJK1008","price":370.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0655\/5143\/3782\/files\/exy-fjk1008_xl.jpg?v=1755360574"},{"product_id":"clutch-lever-assist-spring","title":"Clutch Lever Assist Spring","description":"\u003cp\u003eLever spring connects the top of the clutch fork to a bracket on the transmission (at pitch stop bracket).   Provides additional return force to the fork and slave cylinder piston.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eManufacturer Part No: \u003c\/strong\u003e30546AA060\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat it fits:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSTI MY01-21\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Subaru Genuine","offers":[{"title":"Default Title","offer_id":44009533177910,"sku":"RSTR-1007","price":6.96,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0655\/5143\/3782\/files\/rstr1007.jpg?v=1755916081"},{"product_id":"clutch-fork-dust-cover","title":"Clutch Fork Dust Cover TY856 6MT","description":"\u003cp\u003eRubber boot seals around clutch fork to keep dirt out of the clutch housing area. \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eManufacturer Part No: \u003c\/strong\u003e30542AA050\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat it fits:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSTI 6MT MY01-21\u003c\/li\u003e\n\u003cli\u003eForester STI 6MT\u003c\/li\u003e\n\u003cli\u003eLegacy Spec B 6MT\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Subaru Genuine","offers":[{"title":"Default Title","offer_id":44009658449974,"sku":"RSTR-1009A","price":15.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0655\/5143\/3782\/files\/rstr1009a.jpg?v=1755915668"},{"product_id":"front-pinion-front-support-bearing-ty856-6mt","title":"Front Pinion Front Support Bearing 6MT","description":"\u003cp\u003eDouble row tapered roller bearing with 4-bolt flange.  Bolts to center bearing support plate.  For 6-speed TY856 applications.\u003c\/p\u003e\n\u003cp\u003eThis bearing supports high thrust loads from the hypoid gears and it is not uncommon for this bearing to require replacement.  Always replace if the bearing feels rough or is noisy or shows signs of high temperatures.  The bearing presses on to the front pinion shaft and is secured with a nut and lock washer (which are not considered re-usable).  Shims between the bearing flange and the center plate adjust the pinion depth and may need to be adjusted when replacing this bearing.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eManufacturer Part No: \u003c\/strong\u003e806341040\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat it fits:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSTI MY01-21\u003c\/li\u003e\n\u003cli\u003eLegacy Spec B MY05-09 (6MT TY856)\u003c\/li\u003e\n\u003cli\u003eForester STI MY04-07\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Subaru Genuine","offers":[{"title":"Default Title","offer_id":44044905775158,"sku":"RSTR-1931","price":139.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0655\/5143\/3782\/files\/rstr1931_71ca237f-031a-46f7-aa25-59952ed81f9d.jpg?v=1756763466"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0655\/5143\/3782\/collections\/oemdrivetrain.jpg?v=1750442514","url":"https:\/\/jswnmc-ky.myshopify.com\/collections\/oem-drivetrain.oembed?page=11","provider":"Rallispec","version":"1.0","type":"link"}