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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![Cusco [02 - 14 WRX, 04 - 21 STI, 05 - 09 LGT] Aluminum Pulley Set | 6A1 - 733 - A - JDMusclePulleyscus6A1-733-A](//jdmuscleusa.com/cdn/shop/files/cusco-02-14-wrx-04-21-sti-05-09-lgt-aluminum-pulley-set-6a1-733-a-6902588.jpg?v=1770327688&width=220)
![Cusco [02 - 14 WRX, 04 - 21 STI, 05 - 09 LGT] Aluminum Pulley Set | 6A1 - 733 - A - JDMusclePulleyscus6A1-733-A](//jdmuscleusa.com/cdn/shop/files/cusco-02-14-wrx-04-21-sti-05-09-lgt-aluminum-pulley-set-6a1-733-a-2260376.jpg?v=1770327688&width=220)
Up to $86 offCusco Aluminum Pulley Set | 6A1-733-A
Fits: 02-14 WRX, 04-21 STI, 05-09 LGT
Regular price $454.00Sale price $454.00 Regular priceUnit price per$540.00 -
Up to $9.15 off
In StockPerrin 06-14 WRX / 07-21 STI / 12-16 Impreza / 06-13 FXT / 05-09 Legacy Alternator Pulley Blue | PSP-ENG-119BL
Only 2 leftRegular price $51.85Sale price $51.85 Regular priceUnit price per$61.00 -
![Nameless Performance [11 - 21 WRX Sedan, 11 - 21 STI Sedan] Axle Back Polished Tips and No Muffler for Invidia Q300 / R400 Catback Exhaust Systems | SUAB15STI - INV - 35SSW - JDMuscleAxle Back ExhaustsSUAB15STI-INV-35SSW](//jdmuscleusa.com/cdn/shop/files/nameless-performance-11-21-wrx-sedan-11-21-sti-sedan-axle-back-polished-tips-and-no-muffler-for-invidia-q300-r400-catback-exhaust-systems-suab15sti-inv-35ssw-3762911.jpg?v=1770327808&width=220)
![Nameless Performance [11 - 21 WRX Sedan, 11 - 21 STI Sedan] Axle Back Polished Tips and No Muffler for Invidia Q300 / R400 Catback Exhaust Systems | SUAB15STI - INV - 35SSW - JDMuscleAxle Back ExhaustsSUAB15STI-INV-35SSW](//jdmuscleusa.com/cdn/shop/files/nameless-performance-11-21-wrx-sedan-11-21-sti-sedan-axle-back-polished-tips-and-no-muffler-for-invidia-q300-r400-catback-exhaust-systems-suab15sti-inv-35ssw-3096433.jpg?v=1770327809&width=220)
Nameless Performance Axle Back Polished Tips and No Muffler for Invidia Q300 / R400 Catback Exhaust Systems
Fits: 11-21 WRX Sedan, 11-21 STI Sedan
Regular price $730.00Sale price $730.00 Regular priceUnit price per$0.00 -
![Nameless Performance [02 - 07 WRX, 02 - 21 STI, 02 - 07 Forester XT] Bypass Valve | SUBPV02STI - 02WRX - 04FXT - JDMuscleValvesSUBPV02STI-02WRX-04FXT](//jdmuscleusa.com/cdn/shop/files/nameless-performance-02-07-wrx-02-21-sti-02-07-forester-xt-bypass-valve-subpv02sti-02wrx-04fxt-1669663.jpg?v=1770327869&width=220)
![Nameless Performance [02 - 07 WRX, 02 - 21 STI, 02 - 07 Forester XT] Bypass Valve | SUBPV02STI - 02WRX - 04FXT - JDMuscleValvesSUBPV02STI-02WRX-04FXT](//jdmuscleusa.com/cdn/shop/files/nameless-performance-02-07-wrx-02-21-sti-02-07-forester-xt-bypass-valve-subpv02sti-02wrx-04fxt-2634892.jpg?v=1770327869&width=220)
Nameless Performance Bypass Valve
Fits: 02-07 WRX, 02-21 STI, 02-07 Forester XT
Regular price $460.00Sale price $460.00 Regular priceUnit price per$314.00 -
![Torque Solution [02 - 07 WRX, 04 - 21 STI, 04 - 08 FXT] 3 Inch Non Recirculating Style Turbo Inlet Hose Black | TS - SU - 565 - NR - JDMuscleTurbo Inlet Hoses and PipesTS-SU-565-NR](//jdmuscleusa.com/cdn/shop/files/torque-solution-02-07-wrx-04-21-sti-04-08-fxt-3-inch-non-recirculating-style-turbo-inlet-hose-black-ts-su-565-nr-8532909.jpg?v=1770327911&width=220)
![Torque Solution [02 - 07 WRX, 04 - 21 STI, 04 - 08 FXT] 3 Inch Non Recirculating Style Turbo Inlet Hose Black | TS - SU - 565 - NR - JDMuscleTurbo Inlet Hoses and PipesTS-SU-565-NR](//jdmuscleusa.com/cdn/shop/files/torque-solution-02-07-wrx-04-21-sti-04-08-fxt-3-inch-non-recirculating-style-turbo-inlet-hose-black-ts-su-565-nr-9811679.jpg?v=1770327911&width=220)
Up to $37.99 off
In StockTorque Solution 3 Inch Non Recirculating Style Turbo Inlet Hose Black | TS-SU-565-NR
Fits: 02-07 WRX, 04-21 STI, 04-08 FXT
Only 4 leftRegular price $262.00Sale price $262.00 Regular priceUnit price per$299.99 -
![IAG Performance [08 - 14 WRX, 08 - 21 STI] V2 Street Series AOS Replacement Hose Line & Hardware Install Kit | IAG - RPL - 7151IK - JDMuscleAir Oil SeparatorsIAG-RPL-7151IK](//jdmuscleusa.com/cdn/shop/files/iag-performance-08-14-wrx-08-21-sti-v2-street-series-aos-replacement-hose-line-hardware-install-kit-iag-rpl-7151ik-6869419.jpg?v=1770327912&width=220)
IAG Performance V2 Street Series AOS Replacement Hose Line & Hardware Install Kit
Fits: 08-14 WRX, 08-21 STI
Regular price $239.99Sale price $239.99 Regular priceUnit price per$239.99 -
![Nameless Performance [11 - 21 WRX Sedan, 11 - 21 STI Sedan] Axle Back Neochrome Tips for Invidia Q300 / R400 Catback Exhaust Systems | SUAB15STI - INV - 35NEO - JDMuscleAxle Back ExhaustsSUAB15STI-INV-35NEO](//jdmuscleusa.com/cdn/shop/files/nameless-performance-11-21-wrx-sedan-11-21-sti-sedan-axle-back-neochrome-tips-for-invidia-q300-r400-catback-exhaust-systems-suab15sti-inv-35neo-7268990.jpg?v=1770327916&width=220)
![Nameless Performance [11 - 21 WRX Sedan, 11 - 21 STI Sedan] Axle Back Neochrome Tips for Invidia Q300 / R400 Catback Exhaust Systems | SUAB15STI - INV - 35NEO - JDMuscleAxle Back ExhaustsSUAB15STI-INV-35NEO](//jdmuscleusa.com/cdn/shop/files/nameless-performance-11-21-wrx-sedan-11-21-sti-sedan-axle-back-neochrome-tips-for-invidia-q300-r400-catback-exhaust-systems-suab15sti-inv-35neo-6130479.jpg?v=1770327916&width=220)
Nameless Performance Axle Back Neochrome Tips for Invidia Q300 / R400 Catback Exhaust Systems
Fits: 11-21 WRX Sedan, 11-21 STI Sedan
Regular price $840.00Sale price $840.00 Regular priceUnit price per$571.00 -
![IAG Performance [10 - 21 WRX/STI, 05 - 13 Legacy, 04 - 14 Impreza, 04 - 13 Forester, 05 - 09 Outback] Cooper Ring Head Gasket Pair EJ25 100MM Bore .051 Inch Thickness w/ 1/2 Inch or 11MM Head Studs | IAG - ENG - 1731P - JDMuscleHead GasketsIAG-ENG-1731P](//jdmuscleusa.com/cdn/shop/files/iag-performance-10-21-wrxsti-05-13-legacy-04-14-impreza-04-13-forester-05-09-outback-cooper-ring-head-gasket-pair-ej25-100mm-bore-051-inch-thickness-w-12-inch-o-7318148.jpg?v=1770327969&width=220)
IAG Performance Cooper Ring Head Gasket Pair EJ25 100MM Bore .051 Inch Thickness w/ 1/2 Inch or 11MM Head Studs | IAG-ENG-1731P
Fits: 10-21 WRX/STI, 05-13 Legacy, 04-14 Impreza, 04-13 Forester, 05-09 Outback
Regular price $249.99Sale price $249.99 Regular priceUnit price per$249.99 -
![IAG Performance [02 - 14 WRX / 04 - 21 STI / 05 - 09 LGT / 04 - 13 FXT] Street Series Oil Pan Silver | IAG - ENG - 2200SL - JDMuscleOil PansIAG-ENG-2200SL](//jdmuscleusa.com/cdn/shop/files/iag-performance-02-14-wrx-04-21-sti-05-09-lgt-04-13-fxt-street-series-oil-pan-silver-iag-eng-2200sl-7871498.jpg?v=1770327974&width=220)
![IAG Performance [02 - 14 WRX / 04 - 21 STI / 05 - 09 LGT / 04 - 13 FXT] Street Series Oil Pan Silver | IAG - ENG - 2200SL - JDMuscleOil PansIAG-ENG-2200SL](//jdmuscleusa.com/cdn/shop/files/iag-performance-02-14-wrx-04-21-sti-05-09-lgt-04-13-fxt-street-series-oil-pan-silver-iag-eng-2200sl-8214944.jpg?v=1770327974&width=220)
IAG Performance Street Series Oil Pan Silver
Fits: 02-14 WRX, 04-21 STI, 05-09 LGT, 04-13 FXT
Regular price $529.99Sale price $529.99 Regular priceUnit price per$529.99 -
IAG Performance Blow Off Valve Adapter
Fits: 02-07 WRX, 04-21 STI
Regular price $49.99Sale price $49.99 Regular priceUnit price per$49.99 -
iBR FLX01 - Upgrade Kit | 3 Pin and 5 Pin Harnesses
Regular price $399.99Sale price $399.99 Regular priceUnit price per$399.99 -
Cobb WRX/STI/FXT 4 Bar MAP Sensor *Sensor Only*
Regular price $197.00Sale price $197.00 Regular priceUnit price per$197.00 -
IAG Timing Belt Kit with IAG Red Racing Belt, Timing Guide, Adjustable Idlers & Tensioner
Fits: 02-14 WRX, 04-21 STI, 05-12 LGT, 04-13 FXT
Regular price $699.99Sale price $699.99 Regular priceUnit price per$699.99 -
IAG STI Big Bore 76mm Throttle Body w/ Electronics & Adapter Intake Manifolds | IAG-AFD-2027BK
Regular price $414.99Sale price $414.99 Regular priceUnit price per$414.99 -
IAG STI Big Bore 76mm Throttle Body w/ Electronics & Adapter Package Process West Intake Manifolds | IAG-AFD-2028BK
Regular price $414.99Sale price $414.99 Regular priceUnit price per$414.99 -
IAG Subaru STI Big Bore 76mm Throttle Body w/ Electronics & Adapter Package Process West Intake Manifolds | IAG-AFD-2028SL
Regular price $414.99Sale price $414.99 Regular priceUnit price per$414.99
![Cusco [02 - 14 WRX, 04 - 21 STI, 05 - 09 LGT] Aluminum Pulley Set | 6A1 - 733 - A - JDMusclePulleyscus6A1-733-A](http://jdmuscleusa.com/cdn/shop/files/cusco-02-14-wrx-04-21-sti-05-09-lgt-aluminum-pulley-set-6a1-733-a-6902588.jpg?v=1770327688&width=220)
![Cusco [02 - 14 WRX, 04 - 21 STI, 05 - 09 LGT] Aluminum Pulley Set | 6A1 - 733 - A - JDMusclePulleyscus6A1-733-A](http://jdmuscleusa.com/cdn/shop/files/cusco-02-14-wrx-04-21-sti-05-09-lgt-aluminum-pulley-set-6a1-733-a-2260376.jpg?v=1770327688&width=220)
![Nameless Performance [11 - 21 WRX Sedan, 11 - 21 STI Sedan] Axle Back Polished Tips and No Muffler for Invidia Q300 / R400 Catback Exhaust Systems | SUAB15STI - INV - 35SSW - JDMuscleAxle Back ExhaustsSUAB15STI-INV-35SSW](http://jdmuscleusa.com/cdn/shop/files/nameless-performance-11-21-wrx-sedan-11-21-sti-sedan-axle-back-polished-tips-and-no-muffler-for-invidia-q300-r400-catback-exhaust-systems-suab15sti-inv-35ssw-3762911.jpg?v=1770327808&width=220)
![Nameless Performance [11 - 21 WRX Sedan, 11 - 21 STI Sedan] Axle Back Polished Tips and No Muffler for Invidia Q300 / R400 Catback Exhaust Systems | SUAB15STI - INV - 35SSW - JDMuscleAxle Back ExhaustsSUAB15STI-INV-35SSW](http://jdmuscleusa.com/cdn/shop/files/nameless-performance-11-21-wrx-sedan-11-21-sti-sedan-axle-back-polished-tips-and-no-muffler-for-invidia-q300-r400-catback-exhaust-systems-suab15sti-inv-35ssw-3096433.jpg?v=1770327809&width=220)
![Nameless Performance [02 - 07 WRX, 02 - 21 STI, 02 - 07 Forester XT] Bypass Valve | SUBPV02STI - 02WRX - 04FXT - JDMuscleValvesSUBPV02STI-02WRX-04FXT](http://jdmuscleusa.com/cdn/shop/files/nameless-performance-02-07-wrx-02-21-sti-02-07-forester-xt-bypass-valve-subpv02sti-02wrx-04fxt-1669663.jpg?v=1770327869&width=220)
![Nameless Performance [02 - 07 WRX, 02 - 21 STI, 02 - 07 Forester XT] Bypass Valve | SUBPV02STI - 02WRX - 04FXT - JDMuscleValvesSUBPV02STI-02WRX-04FXT](http://jdmuscleusa.com/cdn/shop/files/nameless-performance-02-07-wrx-02-21-sti-02-07-forester-xt-bypass-valve-subpv02sti-02wrx-04fxt-2634892.jpg?v=1770327869&width=220)
![Torque Solution [02 - 07 WRX, 04 - 21 STI, 04 - 08 FXT] 3 Inch Non Recirculating Style Turbo Inlet Hose Black | TS - SU - 565 - NR - JDMuscleTurbo Inlet Hoses and PipesTS-SU-565-NR](http://jdmuscleusa.com/cdn/shop/files/torque-solution-02-07-wrx-04-21-sti-04-08-fxt-3-inch-non-recirculating-style-turbo-inlet-hose-black-ts-su-565-nr-8532909.jpg?v=1770327911&width=220)
![Torque Solution [02 - 07 WRX, 04 - 21 STI, 04 - 08 FXT] 3 Inch Non Recirculating Style Turbo Inlet Hose Black | TS - SU - 565 - NR - JDMuscleTurbo Inlet Hoses and PipesTS-SU-565-NR](http://jdmuscleusa.com/cdn/shop/files/torque-solution-02-07-wrx-04-21-sti-04-08-fxt-3-inch-non-recirculating-style-turbo-inlet-hose-black-ts-su-565-nr-9811679.jpg?v=1770327911&width=220)
![IAG Performance [08 - 14 WRX, 08 - 21 STI] V2 Street Series AOS Replacement Hose Line & Hardware Install Kit | IAG - RPL - 7151IK - JDMuscleAir Oil SeparatorsIAG-RPL-7151IK](http://jdmuscleusa.com/cdn/shop/files/iag-performance-08-14-wrx-08-21-sti-v2-street-series-aos-replacement-hose-line-hardware-install-kit-iag-rpl-7151ik-6869419.jpg?v=1770327912&width=220)
![Nameless Performance [11 - 21 WRX Sedan, 11 - 21 STI Sedan] Axle Back Neochrome Tips for Invidia Q300 / R400 Catback Exhaust Systems | SUAB15STI - INV - 35NEO - JDMuscleAxle Back ExhaustsSUAB15STI-INV-35NEO](http://jdmuscleusa.com/cdn/shop/files/nameless-performance-11-21-wrx-sedan-11-21-sti-sedan-axle-back-neochrome-tips-for-invidia-q300-r400-catback-exhaust-systems-suab15sti-inv-35neo-7268990.jpg?v=1770327916&width=220)
![Nameless Performance [11 - 21 WRX Sedan, 11 - 21 STI Sedan] Axle Back Neochrome Tips for Invidia Q300 / R400 Catback Exhaust Systems | SUAB15STI - INV - 35NEO - JDMuscleAxle Back ExhaustsSUAB15STI-INV-35NEO](http://jdmuscleusa.com/cdn/shop/files/nameless-performance-11-21-wrx-sedan-11-21-sti-sedan-axle-back-neochrome-tips-for-invidia-q300-r400-catback-exhaust-systems-suab15sti-inv-35neo-6130479.jpg?v=1770327916&width=220)
![IAG Performance [10 - 21 WRX/STI, 05 - 13 Legacy, 04 - 14 Impreza, 04 - 13 Forester, 05 - 09 Outback] Cooper Ring Head Gasket Pair EJ25 100MM Bore .051 Inch Thickness w/ 1/2 Inch or 11MM Head Studs | IAG - ENG - 1731P - JDMuscleHead GasketsIAG-ENG-1731P](http://jdmuscleusa.com/cdn/shop/files/iag-performance-10-21-wrxsti-05-13-legacy-04-14-impreza-04-13-forester-05-09-outback-cooper-ring-head-gasket-pair-ej25-100mm-bore-051-inch-thickness-w-12-inch-o-7318148.jpg?v=1770327969&width=220)
![IAG Performance [02 - 14 WRX / 04 - 21 STI / 05 - 09 LGT / 04 - 13 FXT] Street Series Oil Pan Silver | IAG - ENG - 2200SL - JDMuscleOil PansIAG-ENG-2200SL](http://jdmuscleusa.com/cdn/shop/files/iag-performance-02-14-wrx-04-21-sti-05-09-lgt-04-13-fxt-street-series-oil-pan-silver-iag-eng-2200sl-7871498.jpg?v=1770327974&width=220)
![IAG Performance [02 - 14 WRX / 04 - 21 STI / 05 - 09 LGT / 04 - 13 FXT] Street Series Oil Pan Silver | IAG - ENG - 2200SL - JDMuscleOil PansIAG-ENG-2200SL](http://jdmuscleusa.com/cdn/shop/files/iag-performance-02-14-wrx-04-21-sti-05-09-lgt-04-13-fxt-street-series-oil-pan-silver-iag-eng-2200sl-8214944.jpg?v=1770327974&width=220)
