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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Subaru USDM Thermostat Gasket | 21236aa010
Fits: 02-14 WRX, 04-21 STI
Regular price $3.75Sale price $3.75 Regular priceUnit price per$3.75 -
![Moroso [02-07 WRX, 04-19 STI, 04-08 FXT] Aluminum Coolant Expansion Tank - JDMuscleOverflow / Expansion Tanksmor63784](//jdmuscleusa.com/cdn/shop/products/moroso-02-07-wrx-04-19-sti-04-08-fxt-aluminum-coolant-expansion-tank-8680274.jpg?v=1781013312&width=220)
In StockMoroso Aluminum Coolant Expansion Tank
Fits: 02-07 WRX, 04-19 STI, 04-08 FXT
Only 8 leftRegular price $220.99Sale price $220.99 Regular priceUnit price per$220.99 -
In StockDeatschwerks 1000cc Bosch EV14 Fuel Injectors
Fits: 02-14 WRX, 07-21 STI, 07-12 LGT
Only 4 leftRegular price $469.00Sale price $469.00 Regular priceUnit price per$469.00 -
Up to $22.90 off
In StockTurbosmart Kompact Plumb Back BPV
Fits: 02-07 WRX, 04-21 STI, 04-08 FXT
Only 4 leftRegular price $206.09Sale price $206.09 Regular priceUnit price per$228.99 -
![Cobb [Subaru] Silicone Exhaust Hanger 12mm x 35mm - JDMuscleExhaust HangerscobbUNI-001-272](//jdmuscleusa.com/cdn/shop/files/cobb-subaru-silicone-exhaust-hanger-12mm-x-35mm-3590037.jpg?v=1770322211&width=220)
In StockCobb Silicone Exhaust Hanger 12mm x 35mm
Fits: Subaru
Only 3 leftRegular price $12.00Sale price $12.00 Regular priceUnit price per -
![CSF [08 - 21 WRX/STI] 2 - Row 42mm Race - Spec All Aluminum Radiator - Black | 7095B - JDMuscleRadiatorscsf7095B](//jdmuscleusa.com/cdn/shop/files/csf-08-21-wrxsti-2-row-42mm-race-spec-all-aluminum-radiator-black-7095b-8634755.jpg?v=1770324975&width=220)
![CSF [08 - 21 WRX/STI] 2 - Row 42mm Race - Spec All Aluminum Radiator - Black | 7095B - JDMuscleRadiatorscsf7095B](//jdmuscleusa.com/cdn/shop/files/csf-08-21-wrxsti-2-row-42mm-race-spec-all-aluminum-radiator-black-7095b-6844231.jpg?v=1770324975&width=220)
Up to $24 off
In StockCSF 2-Row 42mm Race-Spec All Aluminum Radiator - Black | 7095B
Fits: 08-21 WRX/STI
Only 12 leftRegular price $485.00Sale price $485.00 Regular priceUnit price per$509.00 -
![Torque Solution [08 - 14 WRX, 08 - 21 STI] Oil Fill Tube Relocation | TS - SU - 757 - JDMuscleOil Control DevicestqsTS-SU-757](//jdmuscleusa.com/cdn/shop/files/torque-solution-08-14-wrx-08-21-sti-oil-fill-tube-relocation-ts-su-757-7338747.jpg?v=1770325029&width=220)
![Torque Solution [08 - 14 WRX, 08 - 21 STI] Oil Fill Tube Relocation | TS - SU - 757 - JDMuscleOil Control DevicestqsTS-SU-757](//jdmuscleusa.com/cdn/shop/files/torque-solution-08-14-wrx-08-21-sti-oil-fill-tube-relocation-ts-su-757-9472488.jpg?v=1770325029&width=220)
Up to $17.77 offTorque Solution Oil Fill Tube Relocation
Fits: 08-14 WRX, 08-21 STI
Regular price $160.00Sale price $160.00 Regular priceUnit price per$177.77 -
![Invidia [08-14 WRX Sedan / 11-14 STI Sedan] N1 Cat Back Exhaust Single Tip | HS08SW4GTP](//jdmuscleusa.com/cdn/shop/products/invidia-n1-cat-back-exhaust-single-tip-subaru-wrx-sedan-2008-2014-sti-sedan-2011-2014-hs08sw4gtp-cat-back-exhaust-system-invidia-invhs08sw4gtp.jpg?v=1614517089&width=220)
Up to $556.60 off
In StockInvidia N1 Cat Back Exhaust Single Tip | HS08SW4GTP
Fits: 08-14 WRX Sedan / 11-14 STI Sedan
Only 7 leftRegular price $1,031.00Sale price $1,031.00 Regular priceUnit price per$1,587.60 -
![Tomei [08-21 STI / 10-12 Legacy GT] Poncam Camshafts | TOMTA301A-SB02C - JDMuscleCamsTOMTA301A-SB02C](//jdmuscleusa.com/cdn/shop/products/tomei-08-21-sti-10-12-legacy-gt-poncam-camshafts-tomta301a-sb02c-5352335.jpg?v=1781014153&width=220)
Up to $88 off
In StockTomei Poncam Camshafts | TOMTA301A-SB02C
Fits: 08-21 STI / 10-12 Legacy GT
Only 4 leftRegular price $792.00Sale price $792.00 Regular priceUnit price per$880.00 -
Prosport Un-Equal Length Headers WRX 2002-2014 / STI 2004-2014
Regular price $806.00Sale price $806.00 Regular priceUnit price per$806.00 -
Up to $28.35 offCometic 08-21 STI Street Pro Gasket Kit | PRO2048C
Regular price $376.74Sale price $376.74 Regular priceUnit price per$405.09 -
![Extreme Online Store [11 - 14 WRX/STI] Muffler Delete Axle Back Quad Exhaust - JDMuscleAxle Back ExhaustsEXT-MD042Anodized Silver](//jdmuscleusa.com/cdn/shop/files/extreme-online-store-11-14-wrxsti-muffler-delete-axle-back-quad-exhaust-3358239.png?v=1770326778&width=220)
![Extreme Online Store [11 - 14 WRX/STI] Muffler Delete Axle Back Quad Exhaust - JDMuscleAxle Back ExhaustsEXT-MD042Anodized Silver](//jdmuscleusa.com/cdn/shop/files/extreme-online-store-11-14-wrxsti-muffler-delete-axle-back-quad-exhaust-7766750.png?v=1770326778&width=220)
Extreme Online Store Muffler Delete Axle Back Quad Exhaust
Fits: 11-14 WRX/STI
Regular price From $300.00Sale price From $300.00 Regular priceUnit price per$256.98 -
In StockHKS Fine Tune Power Steering / Alternator V-Belt
Fits: 08-21 STI, 08-14 WRX
Only 12 leftRegular price $56.00Sale price $56.00 Regular priceUnit price per$56.00 -
![Perrin [08 - 21 STI] Boost Solenoid Cover Hyper Pink | PSP - ENG - 161HP - JDMuscleBoost Control Solenoid CoversperPSP-ENG-161HP](//jdmuscleusa.com/cdn/shop/files/perrin-08-21-sti-boost-solenoid-cover-hyper-pink-psp-eng-161hp-9111797.jpg?v=1770327864&width=220)
![Perrin [08 - 21 STI] Boost Solenoid Cover Hyper Pink | PSP - ENG - 161HP - JDMuscleBoost Control Solenoid CoversperPSP-ENG-161HP](//jdmuscleusa.com/cdn/shop/files/perrin-08-21-sti-boost-solenoid-cover-hyper-pink-psp-eng-161hp-2631792.jpg?v=1770327865&width=220)
Up to $11.55 off
In StockPerrin Boost Solenoid Cover Hyper Pink | PSP-ENG-161HP
Fits: 08-21 STI
Only 7 leftRegular price $65.45Sale price $65.45 Regular priceUnit price per$77.00 -
IAG Performance 02-14 WRX / 04-21 STI / 05-09 LGT / 04-13 FXT V2 Oil Pickup and Oil Control Baffle / Windage Tray Combo | IAG-ENG-2101
Regular price $329.99Sale price $329.99 Regular priceUnit price per$329.99 -
![Killer B Motorsports [02 - 07 WRX, 04 - 21 STI] 3" Cast Turbo Inlet to 84mm Adapter Coupler | TIEJC84 - JDMuscleTurbo Inlet Hoses and PipesklbTIEJC84](//jdmuscleusa.com/cdn/shop/files/killer-b-motorsports-02-07-wrx-04-21-sti-3-cast-turbo-inlet-to-84mm-adapter-coupler-tiejc84-6849084.jpg?v=1770327976&width=220)
Killer B Motorsports 3" Cast Turbo Inlet to 84mm Adapter Coupler | TIEJC84
Fits: 02-07 WRX, 04-21 STI
Regular price $49.00Sale price $49.00 Regular priceUnit price per$49.00
![Moroso [02-07 WRX, 04-19 STI, 04-08 FXT] Aluminum Coolant Expansion Tank - JDMuscleOverflow / Expansion Tanksmor63784](http://jdmuscleusa.com/cdn/shop/products/moroso-02-07-wrx-04-19-sti-04-08-fxt-aluminum-coolant-expansion-tank-8680274.jpg?v=1781013312&width=220)
![Cobb [Subaru] Silicone Exhaust Hanger 12mm x 35mm - JDMuscleExhaust HangerscobbUNI-001-272](http://jdmuscleusa.com/cdn/shop/files/cobb-subaru-silicone-exhaust-hanger-12mm-x-35mm-3590037.jpg?v=1770322211&width=220)
![CSF [08 - 21 WRX/STI] 2 - Row 42mm Race - Spec All Aluminum Radiator - Black | 7095B - JDMuscleRadiatorscsf7095B](http://jdmuscleusa.com/cdn/shop/files/csf-08-21-wrxsti-2-row-42mm-race-spec-all-aluminum-radiator-black-7095b-8634755.jpg?v=1770324975&width=220)
![CSF [08 - 21 WRX/STI] 2 - Row 42mm Race - Spec All Aluminum Radiator - Black | 7095B - JDMuscleRadiatorscsf7095B](http://jdmuscleusa.com/cdn/shop/files/csf-08-21-wrxsti-2-row-42mm-race-spec-all-aluminum-radiator-black-7095b-6844231.jpg?v=1770324975&width=220)
![Torque Solution [08 - 14 WRX, 08 - 21 STI] Oil Fill Tube Relocation | TS - SU - 757 - JDMuscleOil Control DevicestqsTS-SU-757](http://jdmuscleusa.com/cdn/shop/files/torque-solution-08-14-wrx-08-21-sti-oil-fill-tube-relocation-ts-su-757-7338747.jpg?v=1770325029&width=220)
![Torque Solution [08 - 14 WRX, 08 - 21 STI] Oil Fill Tube Relocation | TS - SU - 757 - JDMuscleOil Control DevicestqsTS-SU-757](http://jdmuscleusa.com/cdn/shop/files/torque-solution-08-14-wrx-08-21-sti-oil-fill-tube-relocation-ts-su-757-9472488.jpg?v=1770325029&width=220)
![Invidia [08-14 WRX Sedan / 11-14 STI Sedan] N1 Cat Back Exhaust Single Tip | HS08SW4GTP](http://jdmuscleusa.com/cdn/shop/products/invidia-n1-cat-back-exhaust-single-tip-subaru-wrx-sedan-2008-2014-sti-sedan-2011-2014-hs08sw4gtp-cat-back-exhaust-system-invidia-invhs08sw4gtp.jpg?v=1614517089&width=220)
![Tomei [08-21 STI / 10-12 Legacy GT] Poncam Camshafts | TOMTA301A-SB02C - JDMuscleCamsTOMTA301A-SB02C](http://jdmuscleusa.com/cdn/shop/products/tomei-08-21-sti-10-12-legacy-gt-poncam-camshafts-tomta301a-sb02c-5352335.jpg?v=1781014153&width=220)
![Extreme Online Store [11 - 14 WRX/STI] Muffler Delete Axle Back Quad Exhaust - JDMuscleAxle Back ExhaustsEXT-MD042Anodized Silver](http://jdmuscleusa.com/cdn/shop/files/extreme-online-store-11-14-wrxsti-muffler-delete-axle-back-quad-exhaust-3358239.png?v=1770326778&width=220)
![Extreme Online Store [11 - 14 WRX/STI] Muffler Delete Axle Back Quad Exhaust - JDMuscleAxle Back ExhaustsEXT-MD042Anodized Silver](http://jdmuscleusa.com/cdn/shop/files/extreme-online-store-11-14-wrxsti-muffler-delete-axle-back-quad-exhaust-7766750.png?v=1770326778&width=220)
![Perrin [08 - 21 STI] Boost Solenoid Cover Hyper Pink | PSP - ENG - 161HP - JDMuscleBoost Control Solenoid CoversperPSP-ENG-161HP](http://jdmuscleusa.com/cdn/shop/files/perrin-08-21-sti-boost-solenoid-cover-hyper-pink-psp-eng-161hp-9111797.jpg?v=1770327864&width=220)
![Perrin [08 - 21 STI] Boost Solenoid Cover Hyper Pink | PSP - ENG - 161HP - JDMuscleBoost Control Solenoid CoversperPSP-ENG-161HP](http://jdmuscleusa.com/cdn/shop/files/perrin-08-21-sti-boost-solenoid-cover-hyper-pink-psp-eng-161hp-2631792.jpg?v=1770327865&width=220)
![Killer B Motorsports [02 - 07 WRX, 04 - 21 STI] 3" Cast Turbo Inlet to 84mm Adapter Coupler | TIEJC84 - JDMuscleTurbo Inlet Hoses and PipesklbTIEJC84](http://jdmuscleusa.com/cdn/shop/files/killer-b-motorsports-02-07-wrx-04-21-sti-3-cast-turbo-inlet-to-84mm-adapter-coupler-tiejc84-6849084.jpg?v=1770327976&width=220)