Optimize your Subaru STI 2008-2014 engine's performance with a comprehensive range of top-quality aftermarket parts from industry-leading brands. Elevate the power and efficiency of your vehicle with ETS, HKS, Perrin, Mishimoto, AMS, Grimmspeed, Cobb, Remark, PLM, Turbosmart, IAG Performance, and more. Enhance airflow and filtration through AIR INTAKE DUCTS and COLD AIR INTAKES, while maintaining engine cleanliness with AIR OIL SEPARATORS and CATCH CANS. Experience impeccable control and responsiveness with BLOW OFF VALVES and BOOST CONTROL SOLENOID COVERS, complemented by the reliability of ENGINE MOUNTS and meticulously crafted ENGINE MANAGEMENT HARNESSES. Simplify maintenance and improve overall performance with DIPSTICKS and explore comprehensive ENGINE PACKAGE DEALS for a holistic approach to upgrading your Subaru WRX's engine. Unleash the full potential of your vehicle through precision-engineered components designed to deliver both power and durability, all meticulously designed to give your Subaru STI the edge on the road or track.
2008-2014 Subaru WRX STI Engine Parts
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![GrimmSpeed [02 - 14 WRX, 04 - 21 STI, 05 - 12 LGT, 04 - 13 FXT] Intake Manifold to TGV Gasket Pair | 023001 - JDMuscleIntake System Gasketgrm023001](//jdmuscleusa.com/cdn/shop/files/grimmspeed-02-14-wrx-04-21-sti-05-12-lgt-04-13-fxt-intake-manifold-to-tgv-gasket-pair-023001-4508665.jpg?v=1770327638&width=220)
In StockGrimmSpeed Intake Manifold to TGV Gasket Pair | 023001
Fits: 02-14 WRX, 04-21 STI, 05-12 LGT, 04-13 FXT
Only 1 leftRegular price $29.00Sale price $29.00 Regular priceUnit price per$29.00 -
Up to $35.05 off
In StockMishimoto Performance Aluminum Radiator Manual Transmission
Fits: 08-14 WRX, 08-21 STI
Only 12 leftRegular price $349.95Sale price $349.95 Regular priceUnit price per$385.00 -
![COBB [02 - 07 WRX, 04 - 21 STI, 04 - 08 FXT] Throttle Body Coupler - Black | 712455 - JDMuscleThrottle Body Hosescobb712455](//jdmuscleusa.com/cdn/shop/products/cobb-02-07-wrx-04-21-sti-04-08-fxt-throttle-body-coupler-black-712455-6973469.jpg?v=1770336382&width=220)
In StockCobb Tuning Throttle Body Coupler - Stealth Black
Fits: 02-07 WRX, 04-21 STI, 04-08 Forester XT
Regular price $58.00Sale price $58.00 Regular priceUnit price per$58.00 -
Up to $20 off
In StockRadium Engineering Fuel Rail Plumbing Kit - Parallel
Fits: 04-21 STI
Only 12 leftRegular price $379.95Sale price $379.95 Regular priceUnit price per$399.95 -
Up to $4 off
In StockRadium Engineering DIY Fuel Pump Wiring Kit - Universal
Regular price $75.95Sale price $75.95 Regular priceUnit price per$79.95 -
Up to $31.99 off
In StockEagle Connecting Rods
Fits: 02-14 WRX, 04-21 STI
Only 12 leftRegular price $375.00Sale price $375.00 Regular priceUnit price per$406.99 -
Up to $74.98 offTurbo XS RFL Series Hybrid Blow Off Valve
Fits: 02-07 WRX, 04-21 STI
Regular price $250.00Sale price $250.00 Regular priceUnit price per$324.98 -
![GrimmSpeed [02-14 WRX / 04-21 STI] Alternator Cover Black | 099012](//jdmuscleusa.com/cdn/shop/products/grimmspeed-black-alternator-cover-subaru-wrx-sti-forester-xt-outback-xt-099012-alternator-covers-grimmspeed-grm099012.jpg?v=1625804898&width=220)
![GrimmSpeed [02-14 WRX / 04-21 STI] Alternator Cover Black | 099012](//jdmuscleusa.com/cdn/shop/products/grimmspeed-black-alternator-cover-subaru-wrx-sti-forester-xt-outback-xt-099012-alternator-covers-grimmspeed-grm099012-2.jpg?v=1625804898&width=220)
In StockGrimmSpeed Alternator Cover Black | 099012
Fits: 02-14 WRX / 04-21 STI
Only 1 leftRegular price $135.00Sale price $135.00 Regular priceUnit price per$135.00 -
![GrimmSpeed [02-07 WRX / 04-21 STI] Intercooler Y-Pipe Gaskets | 020024](//jdmuscleusa.com/cdn/shop/products/grimmspeed-top-mount-intercooler-y-pipe-gasket-pair-subaru-wrx-2002-2007-sti-2004-2020-020024-gaskets-grimmspeed-grm020024.jpg?v=1614517939&width=220)
![GrimmSpeed [02-07 WRX / 04-21 STI] Intercooler Y-Pipe Gaskets | 020024](//jdmuscleusa.com/cdn/shop/products/grimmspeed-top-mount-intercooler-y-pipe-gasket-pair-subaru-wrx-2002-2007-sti-2004-2020-020024-gaskets-grimmspeed-grm020024-2.jpg?v=1614675534&width=220)
In StockGrimmSpeed Intercooler Y-Pipe Gaskets | 020024
Fits: 02-07 WRX / 04-21 STI
Only 1 leftRegular price $33.00Sale price $33.00 Regular priceUnit price per$33.00 -
![GrimmSpeed [02-14 WRX, 04-21 STI] TGV to Engine Gasket Pair | 032001](//jdmuscleusa.com/cdn/shop/products/grimmspeed-tumbler-to-engine-gaskets-for-subaru-gasket-032001-exhaust-gaskets-and-hardware-grimmspeed-grmgasket-032001.jpg?v=1614517838&width=220)
In StockGrimmSpeed TGV to Engine Gasket Pair | 032001
Fits: 02-14 WRX, 04-21 STI
Only 1 leftRegular price $29.00Sale price $29.00 Regular priceUnit price per$29.00 -
![Invidia [11-14 WRX Hatch / 08-14 STI Hatch] Gemini R400 SS Tip Cat Back Exhaust | HS08ST5GM4SS](//jdmuscleusa.com/cdn/shop/products/invidia-gemini-r400-ss-tip-cat-back-exhaust-subaru-wrx-2011-2014-hatch-sti-2008-2014-hatch-hs08st5gm4ss-cat-back-exhaust-system-invidia-invhs08st5gm4ss.jpg?v=1614516966&width=220)
Up to $697.72 off
In StockInvidia
Fits: 11-14 WRX Hatch
Only 7 leftRegular price $1,535.00Sale price $1,535.00 Regular priceUnit price per$2,232.72 -
APR 08-14 WRX / 08-21 STI Carbon Fiber Alternator Cover | CBE-WRXALT08
Regular price $154.00Sale price $154.00 Regular priceUnit price per$154.00 -
Up to $18 off
In StockOVERTAKE Catback Exhaust Hardware Refresh Kit
Fits: 08-26 WRX, 08-21 STI Sedan
Regular price $89.00Sale price $89.00 Regular priceUnit price per$107.00 -
TR Twin Scroll High Flow Catless Downpipe
Fits: 08-14 WRX, 08-18 STI
Regular price $750.00Sale price $750.00 Regular priceUnit price per$600.00 -
In StockIAG Air / Oil Separator | AOS
Fits: 08-14 WRX, 08-21 STI
Only 1 leftRegular price $499.99Sale price $499.99 Regular priceUnit price per$499.99 -
In StockHKS Fine Tune Power Steering / Alternator V-Belt
Fits: 08-21 STI, 08-14 WRX
Only 7 leftRegular price $58.00Sale price $58.00 Regular priceUnit price per$58.00
![GrimmSpeed [02 - 14 WRX, 04 - 21 STI, 05 - 12 LGT, 04 - 13 FXT] Intake Manifold to TGV Gasket Pair | 023001 - JDMuscleIntake System Gasketgrm023001](http://jdmuscleusa.com/cdn/shop/files/grimmspeed-02-14-wrx-04-21-sti-05-12-lgt-04-13-fxt-intake-manifold-to-tgv-gasket-pair-023001-4508665.jpg?v=1770327638&width=220)
![COBB [02 - 07 WRX, 04 - 21 STI, 04 - 08 FXT] Throttle Body Coupler - Black | 712455 - JDMuscleThrottle Body Hosescobb712455](http://jdmuscleusa.com/cdn/shop/products/cobb-02-07-wrx-04-21-sti-04-08-fxt-throttle-body-coupler-black-712455-6973469.jpg?v=1770336382&width=220)
![GrimmSpeed [02-14 WRX / 04-21 STI] Alternator Cover Black | 099012](http://jdmuscleusa.com/cdn/shop/products/grimmspeed-black-alternator-cover-subaru-wrx-sti-forester-xt-outback-xt-099012-alternator-covers-grimmspeed-grm099012.jpg?v=1625804898&width=220)
![GrimmSpeed [02-14 WRX / 04-21 STI] Alternator Cover Black | 099012](http://jdmuscleusa.com/cdn/shop/products/grimmspeed-black-alternator-cover-subaru-wrx-sti-forester-xt-outback-xt-099012-alternator-covers-grimmspeed-grm099012-2.jpg?v=1625804898&width=220)
![GrimmSpeed [02-07 WRX / 04-21 STI] Intercooler Y-Pipe Gaskets | 020024](http://jdmuscleusa.com/cdn/shop/products/grimmspeed-top-mount-intercooler-y-pipe-gasket-pair-subaru-wrx-2002-2007-sti-2004-2020-020024-gaskets-grimmspeed-grm020024.jpg?v=1614517939&width=220)
![GrimmSpeed [02-07 WRX / 04-21 STI] Intercooler Y-Pipe Gaskets | 020024](http://jdmuscleusa.com/cdn/shop/products/grimmspeed-top-mount-intercooler-y-pipe-gasket-pair-subaru-wrx-2002-2007-sti-2004-2020-020024-gaskets-grimmspeed-grm020024-2.jpg?v=1614675534&width=220)
![GrimmSpeed [02-14 WRX, 04-21 STI] TGV to Engine Gasket Pair | 032001](http://jdmuscleusa.com/cdn/shop/products/grimmspeed-tumbler-to-engine-gaskets-for-subaru-gasket-032001-exhaust-gaskets-and-hardware-grimmspeed-grmgasket-032001.jpg?v=1614517838&width=220)
![Invidia [11-14 WRX Hatch / 08-14 STI Hatch] Gemini R400 SS Tip Cat Back Exhaust | HS08ST5GM4SS](http://jdmuscleusa.com/cdn/shop/products/invidia-gemini-r400-ss-tip-cat-back-exhaust-subaru-wrx-2011-2014-hatch-sti-2008-2014-hatch-hs08st5gm4ss-cat-back-exhaust-system-invidia-invhs08st5gm4ss.jpg?v=1614516966&width=220)
