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 [02-07 WRX, 04-21 STI] Blow Off Valve Flange Gasket | 020023](//jdmuscleusa.com/cdn/shop/products/grimmspeed-subaru-intercooler-bov-gasket-wrx-2002-2005-sti-2004-2020-020023-gaskets-grimmspeed-grm020023.jpg?v=1614517904&width=220)
![GrimmSpeed [02-07 WRX, 04-21 STI] Blow Off Valve Flange Gasket | 020023](//jdmuscleusa.com/cdn/shop/products/grimmspeed-subaru-intercooler-bov-gasket-wrx-2002-2005-sti-2004-2020-020023-gaskets-grimmspeed-grm020023-2.jpg?v=1614675514&width=220)
In StockGrimmSpeed Blow Off Valve Flange Gasket
Fits: 02-07 WRX, 04-21 STI
Only 1 leftRegular price $29.00Sale price $29.00 Regular priceUnit price per$29.00 -
![Cobb [08 - 14 WRX/ 08 - 21 STI] Redline Carbon Fiber Alternator Cover Gloss Finish | 422600 - JDMuscleAlternator Coverscobb422600](//jdmuscleusa.com/cdn/shop/products/cobb-08-14-wrx-08-21-sti-redline-carbon-fiber-alternator-cover-gloss-finish-422600-8998082.jpg?v=1770336383&width=220)
![Cobb [08 - 14 WRX/ 08 - 21 STI] Redline Carbon Fiber Alternator Cover Gloss Finish | 422600 - JDMuscleAlternator Coverscobb422600](//jdmuscleusa.com/cdn/shop/products/cobb-08-14-wrx-08-21-sti-redline-carbon-fiber-alternator-cover-gloss-finish-422600-5259871.jpg?v=1770336383&width=220)
In StockCobb Tuning Redline Carbon Fiber Alternator Cover - Gloss Finish
Fits: 08-14 WRX, 08-21 STI
Only 19 leftRegular price $183.00Sale price $183.00 Regular priceUnit price per$183.00 -
Up to $89 off
In StockTomei 08-14 WRX / 04-21 STI Equal Length Exhaust Manifold | TB6010-SB02B
Only 5 leftRegular price $801.00Sale price $801.00 Regular priceUnit price per$890.00 -
![HKS [08-21 STI] Super SQV4 Blow Off Valve - JDMuscleBlow Off Valveshks71008-AF013](//jdmuscleusa.com/cdn/shop/products/hks-08-21-sti-super-sqv4-blow-off-valve-8637108.jpg?v=1786515613&width=220)
In StockHKS Super SQV4 Blow Off Valve
Fits: 08-21 STI
Regular price $435.00Sale price $435.00 Regular priceUnit price per$435.00 -
![GrimmSpeed 3in Downpipe to Stock Cat-Back Adapter [Subaru Turbo Models inc. 15-21 WRX/STI] | 077044](//jdmuscleusa.com/cdn/shop/products/grimmspeed-3in-downpipe-adapter-for-subaru-077044-exhaust-gaskets-and-hardware-grimmspeed-grm077044.jpg?v=1614517852&width=220)
In StockGrimmSpeed 3in Downpipe to Stock Cat-Back Adapter
Fits: Subaru Turbo Models inc. 15-21 WRX/STI
Regular price $81.00Sale price $81.00 Regular priceUnit price per$81.00 -
![Grimmspeed [02-14 WRX / 04-21 STI] Top Mount Intercooler Silicone Coupler Kit Black](//jdmuscleusa.com/cdn/shop/products/grimmspeed-top-mount-intercooler-silicone-hose-kit-subaru-wrx-2002-2007-sti-2004-2020-090108-090109-intercooler-hose-kits-grimmspeed-black-grm090109.jpg?v=1614517802&width=220)
![Grimmspeed [02-14 WRX / 04-21 STI] Top Mount Intercooler Silicone Coupler Kit Black](//jdmuscleusa.com/cdn/shop/products/grimmspeed-top-mount-intercooler-silicone-hose-kit-subaru-wrx-2002-2007-sti-2004-2020-090108-090109-intercooler-hose-kits-grimmspeed-3.jpg?v=1614658473&width=220)
In StockGrimmspeed Top Mount Intercooler Silicone Coupler Kit Black
Fits: 02-14 WRX / 04-21 STI
Only 2 leftRegular price $135.00Sale price $135.00 Regular priceUnit price per$135.00 -
In StockOVERTAKE Adjustable Exhaust Hanger - 12mm
Fits: 08-26 WRX, 08-21 STI, 13-26 BRZ
Regular price From $13.00Sale price From $13.00 Regular priceUnit price per$13.00 -
![Grimmspeed [08 - 21 STI] 3 - Port Electronic Boost Control Solenoid | 057007 - JDMuscleBoost Control Solenoidsgrm057007](//jdmuscleusa.com/cdn/shop/files/grimmspeed-08-21-sti-3-port-electronic-boost-control-solenoid-057007-8076841.jpg?v=1770328225&width=220)
![Grimmspeed [08 - 21 STI] 3 - Port Electronic Boost Control Solenoid | 057007 - JDMuscleBoost Control Solenoidsgrm057007](//jdmuscleusa.com/cdn/shop/files/grimmspeed-08-21-sti-3-port-electronic-boost-control-solenoid-057007-2664053.jpg?v=1770328225&width=220)
In StockGrimmspeed 3-Port Electronic Boost Control Solenoid
Fits: 08-21 STI
Only 1 leftRegular price $190.00Sale price $190.00 Regular priceUnit price per$190.00 -
In StockGrimmSpeed Version 2 Turbo Heat Shield
Fits: 02-14 WRX, 04-21 STI, 05-12 LGT, 04-13 FXT
Regular price From $110.00Sale price From $110.00 Regular priceUnit price per$110.00 -
![HKS [02 - 25 WRX/STI, 13 - 21 BRZ/FRS/86] 1.1 Bar Limited Edition Radiator Cap | 15009 - AK004 - JDMuscleRadiator CapsHKS15009-AK004](//jdmuscleusa.com/cdn/shop/products/hks-02-25-wrxsti-13-21-brzfrs86-11-bar-limited-edition-radiator-cap-15009-ak004-2331844.jpg?v=1770332249&width=220)
![HKS [02 - 25 WRX/STI, 13 - 21 BRZ/FRS/86] 1.1 Bar Limited Edition Radiator Cap | 15009 - AK004 - JDMuscleRadiator CapsHKS15009-AK004](//jdmuscleusa.com/cdn/shop/products/hks-02-25-wrxsti-13-21-brzfrs86-11-bar-limited-edition-radiator-cap-15009-ak004-7878472.jpg?v=1770332250&width=220)
In StockHKS 1.1 Bar Limited Edition Radiator Cap
Fits: 02-26 WRX/STI, 13-21 BRZ/FRS/86
Regular price $42.00Sale price $42.00 Regular priceUnit price per$42.00 -
![Go Fast Bit [02-07 WRX, 04-21 STI] Hybrid Dual Outlet Blow Off Valve | T9203](//jdmuscleusa.com/cdn/shop/products/go-fast-bits-hybrid-dual-outlet-valve-02-07-subaru-wrx-04-20-sti-05-08-fxt-t9203-blow-off-valves-go-fast-bits-gfbt9203.jpg?v=1614545897&width=220)
Up to $26.09 off
In StockGo Fast Bit Hybrid Dual Outlet Blow Off Valve
Fits: 02-07 WRX, 04-21 STI
Only 15 leftRegular price $234.81Sale price $234.81 Regular priceUnit price per$260.90 -
![HKS [08 - 21 STI] Super SQV4 Blow Off Valve Black Edition w/ Suction Return Kit | 71008 - KF013VB - JDMuscleBlow Off Valveshks71008-KF013VB](//jdmuscleusa.com/cdn/shop/products/hks-08-21-sti-super-sqv4-blow-off-valve-black-edition-w-suction-return-kit-71008-kf013vb-3903918.jpg?v=1770331689&width=220)
![HKS [08 - 21 STI] Super SQV4 Blow Off Valve Black Edition w/ Suction Return Kit | 71008 - KF013VB - JDMuscleBlow Off Valveshks71008-KF013VB](//jdmuscleusa.com/cdn/shop/products/hks-08-21-sti-super-sqv4-blow-off-valve-black-edition-w-suction-return-kit-71008-kf013vb-2517622.jpg?v=1770331689&width=220)
In StockHKS Super SQV4 Blow Off Valve Black Edition w/ Suction Return Kit
Fits: 08-21 STI
Only 18 leftRegular price $383.00Sale price $383.00 Regular priceUnit price per$383.00 -
![Perrin [02 - 25 WRX, 04 - 21 STI, 13 - 25 BRZ/FRS/86] Oil Fill Cap | PSP - ENG - 711 - JDMuscleOil CapsperPSP-ENG-711RDRed](//jdmuscleusa.com/cdn/shop/files/perrin-02-25-wrx-04-21-sti-13-25-brzfrs86-oil-fill-cap-psp-eng-711-3496812.png?v=1770332363&width=220)
![Perrin [02 - 25 WRX, 04 - 21 STI, 13 - 25 BRZ/FRS/86] Oil Fill Cap | PSP - ENG - 711 - JDMuscleOil CapsperPSP-ENG-711BKBlack](//jdmuscleusa.com/cdn/shop/products/perrin-02-25-wrx-04-21-sti-13-25-brzfrs86-oil-fill-cap-psp-eng-711-4476366.jpg?v=1770332363&width=220)
Up to $13.20 off
In StockPerrin Oil Fill Cap
Fits: 02-25 WRX, 04-21 STI, 13-25 BRZ/FRS/86
Regular price From $69.70Sale price From $69.70 Regular priceUnit price per$82.00 -
![PLM [02-14 WRX, 04-21 STI, 04-13 FXT, 05-09 LGT, 05-09 OBXT] Power Driven Up Pipe - JDMuscleTurbo UppipesPLM-SUB-UP-PIPE-IWG](//jdmuscleusa.com/cdn/shop/products/plm-02-14-wrx-04-21-sti-04-13-fxt-05-09-lgt-05-09-obxt-power-driven-up-pipe-7621915.jpg?v=1786515611&width=220)
Up to $54 off
In StockPLM Power Driven Up Pipe
Fits: 02-14 WRX, 04-21 STI, 04-13 FXT, 05-09 LGT, 05-09 OBXT
Only 8 leftRegular price $195.00Sale price $195.00 Regular priceUnit price per$249.00 -
Up to $35.65 off
In StockGo Fast Bits TMS Respons Hybrid Blow Off Valve
Fits: 02-07 WRX, 04-21 STI
Only 5 leftRegular price $320.85Sale price $320.85 Regular priceUnit price per$356.50 -
Up to $85.22 off
In StockFluidampr Balanced Damper
Fits: 02-14 WRX, 04-21 STI
Regular price $482.92Sale price $482.92 Regular priceUnit price per$568.14
![GrimmSpeed [02-07 WRX, 04-21 STI] Blow Off Valve Flange Gasket | 020023](http://jdmuscleusa.com/cdn/shop/products/grimmspeed-subaru-intercooler-bov-gasket-wrx-2002-2005-sti-2004-2020-020023-gaskets-grimmspeed-grm020023.jpg?v=1614517904&width=220)
![GrimmSpeed [02-07 WRX, 04-21 STI] Blow Off Valve Flange Gasket | 020023](http://jdmuscleusa.com/cdn/shop/products/grimmspeed-subaru-intercooler-bov-gasket-wrx-2002-2005-sti-2004-2020-020023-gaskets-grimmspeed-grm020023-2.jpg?v=1614675514&width=220)
![Cobb [08 - 14 WRX/ 08 - 21 STI] Redline Carbon Fiber Alternator Cover Gloss Finish | 422600 - JDMuscleAlternator Coverscobb422600](http://jdmuscleusa.com/cdn/shop/products/cobb-08-14-wrx-08-21-sti-redline-carbon-fiber-alternator-cover-gloss-finish-422600-8998082.jpg?v=1770336383&width=220)
![Cobb [08 - 14 WRX/ 08 - 21 STI] Redline Carbon Fiber Alternator Cover Gloss Finish | 422600 - JDMuscleAlternator Coverscobb422600](http://jdmuscleusa.com/cdn/shop/products/cobb-08-14-wrx-08-21-sti-redline-carbon-fiber-alternator-cover-gloss-finish-422600-5259871.jpg?v=1770336383&width=220)
![HKS [08-21 STI] Super SQV4 Blow Off Valve - JDMuscleBlow Off Valveshks71008-AF013](http://jdmuscleusa.com/cdn/shop/products/hks-08-21-sti-super-sqv4-blow-off-valve-8637108.jpg?v=1786515613&width=220)
![GrimmSpeed 3in Downpipe to Stock Cat-Back Adapter [Subaru Turbo Models inc. 15-21 WRX/STI] | 077044](http://jdmuscleusa.com/cdn/shop/products/grimmspeed-3in-downpipe-adapter-for-subaru-077044-exhaust-gaskets-and-hardware-grimmspeed-grm077044.jpg?v=1614517852&width=220)
![Grimmspeed [02-14 WRX / 04-21 STI] Top Mount Intercooler Silicone Coupler Kit Black](http://jdmuscleusa.com/cdn/shop/products/grimmspeed-top-mount-intercooler-silicone-hose-kit-subaru-wrx-2002-2007-sti-2004-2020-090108-090109-intercooler-hose-kits-grimmspeed-black-grm090109.jpg?v=1614517802&width=220)
![Grimmspeed [02-14 WRX / 04-21 STI] Top Mount Intercooler Silicone Coupler Kit Black](http://jdmuscleusa.com/cdn/shop/products/grimmspeed-top-mount-intercooler-silicone-hose-kit-subaru-wrx-2002-2007-sti-2004-2020-090108-090109-intercooler-hose-kits-grimmspeed-3.jpg?v=1614658473&width=220)
![Grimmspeed [08 - 21 STI] 3 - Port Electronic Boost Control Solenoid | 057007 - JDMuscleBoost Control Solenoidsgrm057007](http://jdmuscleusa.com/cdn/shop/files/grimmspeed-08-21-sti-3-port-electronic-boost-control-solenoid-057007-8076841.jpg?v=1770328225&width=220)
![Grimmspeed [08 - 21 STI] 3 - Port Electronic Boost Control Solenoid | 057007 - JDMuscleBoost Control Solenoidsgrm057007](http://jdmuscleusa.com/cdn/shop/files/grimmspeed-08-21-sti-3-port-electronic-boost-control-solenoid-057007-2664053.jpg?v=1770328225&width=220)
![HKS [02 - 25 WRX/STI, 13 - 21 BRZ/FRS/86] 1.1 Bar Limited Edition Radiator Cap | 15009 - AK004 - JDMuscleRadiator CapsHKS15009-AK004](http://jdmuscleusa.com/cdn/shop/products/hks-02-25-wrxsti-13-21-brzfrs86-11-bar-limited-edition-radiator-cap-15009-ak004-2331844.jpg?v=1770332249&width=220)
![HKS [02 - 25 WRX/STI, 13 - 21 BRZ/FRS/86] 1.1 Bar Limited Edition Radiator Cap | 15009 - AK004 - JDMuscleRadiator CapsHKS15009-AK004](http://jdmuscleusa.com/cdn/shop/products/hks-02-25-wrxsti-13-21-brzfrs86-11-bar-limited-edition-radiator-cap-15009-ak004-7878472.jpg?v=1770332250&width=220)
![Go Fast Bit [02-07 WRX, 04-21 STI] Hybrid Dual Outlet Blow Off Valve | T9203](http://jdmuscleusa.com/cdn/shop/products/go-fast-bits-hybrid-dual-outlet-valve-02-07-subaru-wrx-04-20-sti-05-08-fxt-t9203-blow-off-valves-go-fast-bits-gfbt9203.jpg?v=1614545897&width=220)
![HKS [08 - 21 STI] Super SQV4 Blow Off Valve Black Edition w/ Suction Return Kit | 71008 - KF013VB - JDMuscleBlow Off Valveshks71008-KF013VB](http://jdmuscleusa.com/cdn/shop/products/hks-08-21-sti-super-sqv4-blow-off-valve-black-edition-w-suction-return-kit-71008-kf013vb-3903918.jpg?v=1770331689&width=220)
![HKS [08 - 21 STI] Super SQV4 Blow Off Valve Black Edition w/ Suction Return Kit | 71008 - KF013VB - JDMuscleBlow Off Valveshks71008-KF013VB](http://jdmuscleusa.com/cdn/shop/products/hks-08-21-sti-super-sqv4-blow-off-valve-black-edition-w-suction-return-kit-71008-kf013vb-2517622.jpg?v=1770331689&width=220)
![Perrin [02 - 25 WRX, 04 - 21 STI, 13 - 25 BRZ/FRS/86] Oil Fill Cap | PSP - ENG - 711 - JDMuscleOil CapsperPSP-ENG-711RDRed](http://jdmuscleusa.com/cdn/shop/files/perrin-02-25-wrx-04-21-sti-13-25-brzfrs86-oil-fill-cap-psp-eng-711-3496812.png?v=1770332363&width=220)
![Perrin [02 - 25 WRX, 04 - 21 STI, 13 - 25 BRZ/FRS/86] Oil Fill Cap | PSP - ENG - 711 - JDMuscleOil CapsperPSP-ENG-711BKBlack](http://jdmuscleusa.com/cdn/shop/products/perrin-02-25-wrx-04-21-sti-13-25-brzfrs86-oil-fill-cap-psp-eng-711-4476366.jpg?v=1770332363&width=220)
![PLM [02-14 WRX, 04-21 STI, 04-13 FXT, 05-09 LGT, 05-09 OBXT] Power Driven Up Pipe - JDMuscleTurbo UppipesPLM-SUB-UP-PIPE-IWG](http://jdmuscleusa.com/cdn/shop/products/plm-02-14-wrx-04-21-sti-04-13-fxt-05-09-lgt-05-09-obxt-power-driven-up-pipe-7621915.jpg?v=1786515611&width=220)
