Optimize your Subaru WRX 2002-2005 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 WRX the edge on the road or track.
Subaru WRX 2002-2005 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 -
![OVERTAKE [02-14 WRX, 04-21 STI, 04-13 FXT, 05-09 LGT/OBXT] Downpipe Hardware Kit - JDMuscleExhaust Gaskets and HardwareA10714](//jdmuscleusa.com/cdn/shop/files/overtake-02-14-wrx-04-21-sti-04-13-fxt-05-09-lgtobxt-downpipe-hardware-kit-6482414.jpg?v=1786472178&width=220)
![OVERTAKE [02-14 WRX, 04-21 STI, 04-13 FXT, 05-09 LGT/OBXT] Downpipe Hardware Kit - JDMuscleExhaust Gaskets and HardwareA10714](//jdmuscleusa.com/cdn/shop/files/overtake-02-14-wrx-04-21-sti-04-13-fxt-05-09-lgtobxt-downpipe-hardware-kit-7970498.jpg?v=1786472178&width=220)
In StockOVERTAKE Downpipe Hardware Kit
Fits: 02-14 WRX, 04-21 STI, 04-13 FXT, 05-09 LGT/OBXT
Regular price $29.00Sale price $29.00 Regular priceUnit price per -
Up to $16.26 off
In StockTurbo XS Radiator Stay No Hood Prop - Black
Fits: 02-07 WRX, 04-07 STI
Only 4 leftRegular price $49.00Sale price $49.00 Regular priceUnit price per$65.26 -
In StockDeatschwerks 1000cc Bosch EV14 Fuel Injectors
Fits: 02-14 WRX, 07-21 STI, 07-12 LGT
Only 11 leftRegular price $469.00Sale price $469.00 Regular priceUnit price per$469.00 -
In StockTR Twin Scroll High Flow Catless Downpipe *FOR TWIN SCROLL TURBO USE ONLY*
Fits: 02-07 WRX, 04-07 STI
Regular price $720.00Sale price $720.00 Regular priceUnit price per$720.00 -
In StockOVERTAKE TMIC Silicone Coupler Kit - 2004-2021 STI, 2002-2007 WRX, 2004-2008 Forester XT w/ STI Style TMIC
Regular price $88.00Sale price $88.00 Regular priceUnit price per$88.00 -
Up to $70 offPerrin Red Air Oil Separator | PSP-ENG-605RD
Fits: 02-07 WRX/STI w/ TMIC
Regular price $502.00Sale price $502.00 Regular priceUnit price per$572.00 -
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 -
IAG Performance Replacement Blow Off Valve Elbow Black
Fits: 02-07 WRX, 04-21 STI
Regular price $59.99Sale price $59.99 Regular priceUnit price per$59.99 -
Up to $9.15 off
In StockPerrin 06-14 WRX / 07-21 STI / 12-16 Impreza / 06-13 FXT / 05-09 Legacy Alternator Pulley Red | PSP-ENG-119RD
Only 6 leftRegular price $51.85Sale price $51.85 Regular priceUnit price per$61.00 -
![IAG Performance [02 - 14 WRX, 04 - 21 STI, 05 - 12 LGT, 04 - 13 FXT] 8mm Thick Phenolic Spacers | IAG - AFD - 3104 - JDMusclePhenolic Thermal Intake Manifold SpacersIAG-AFD-3104](//jdmuscleusa.com/cdn/shop/files/iag-performance-02-14-wrx-04-21-sti-05-12-lgt-04-13-fxt-8mm-thick-phenolic-spacers-iag-afd-3104-4678295.jpg?v=1770327978&width=220)
IAG 8mm Thick Phenolic Spacers
Fits: 02-14 WRX, 04-21 STI, 05-12 LGT, 04-13 FXT
Regular price $74.99Sale price $74.99 Regular priceUnit price per$74.99 -
IAG 02-14 WRX, 04-21 STI, 05-09 LGT, 04-13 FXT 550 Street Cylinder Heads Package | IAG-ENG-H550NE
Regular price $3,399.99Sale price $3,399.99 Regular priceUnit price per$3,399.99 -
![Perrin [04 - 07 STI, 02 - 07 WRX] Radiator Shroud - Black | PSP - ENG - 501BK - JDMuscleRadiator ShroudsperPSP-ENG-501BK](//jdmuscleusa.com/cdn/shop/products/perrin-04-07-sti-02-07-wrx-radiator-shroud-black-psp-eng-501bk-3013520.jpg?v=1770329479&width=220)
![Perrin [04 - 07 STI, 02 - 07 WRX] Radiator Shroud - Black | PSP - ENG - 501BK - JDMuscleRadiator ShroudsperPSP-ENG-501BK](//jdmuscleusa.com/cdn/shop/products/perrin-04-07-sti-02-07-wrx-radiator-shroud-black-psp-eng-501bk-9909940.jpg?v=1770329479&width=220)
Up to $10.50 off
In StockPerrin Radiator Shroud - Black | PSP-ENG-501BK
Fits: 04-07 STI, 02-07 WRX
Regular price $59.50Sale price $59.50 Regular priceUnit price per$70.00 -
Up to $70.57 off
In StockGSC Power-Division Single Beehive Valve Spring Set w/ Titanium Retainers Subaru Models | inc. 2002-2014 WRX / 2004+ STI
Only 19 leftRegular price $399.92Sale price $399.92 Regular priceUnit price per$470.49 -
Killer B Motorsport High Flow Water Pump Housing V2 Subaru Models | inc. 2002-2014 WRX/ 2004-2020 STI | WPHV2
Regular price $233.00Sale price $233.00 Regular priceUnit price per$233.00
![OVERTAKE [02-14 WRX, 04-21 STI, 04-13 FXT, 05-09 LGT/OBXT] Downpipe Hardware Kit - JDMuscleExhaust Gaskets and HardwareA10714](http://jdmuscleusa.com/cdn/shop/files/overtake-02-14-wrx-04-21-sti-04-13-fxt-05-09-lgtobxt-downpipe-hardware-kit-6482414.jpg?v=1786472178&width=220)
![OVERTAKE [02-14 WRX, 04-21 STI, 04-13 FXT, 05-09 LGT/OBXT] Downpipe Hardware Kit - JDMuscleExhaust Gaskets and HardwareA10714](http://jdmuscleusa.com/cdn/shop/files/overtake-02-14-wrx-04-21-sti-04-13-fxt-05-09-lgtobxt-downpipe-hardware-kit-7970498.jpg?v=1786472178&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)
![IAG Performance [02 - 14 WRX, 04 - 21 STI, 05 - 12 LGT, 04 - 13 FXT] 8mm Thick Phenolic Spacers | IAG - AFD - 3104 - JDMusclePhenolic Thermal Intake Manifold SpacersIAG-AFD-3104](http://jdmuscleusa.com/cdn/shop/files/iag-performance-02-14-wrx-04-21-sti-05-12-lgt-04-13-fxt-8mm-thick-phenolic-spacers-iag-afd-3104-4678295.jpg?v=1770327978&width=220)
![Perrin [04 - 07 STI, 02 - 07 WRX] Radiator Shroud - Black | PSP - ENG - 501BK - JDMuscleRadiator ShroudsperPSP-ENG-501BK](http://jdmuscleusa.com/cdn/shop/products/perrin-04-07-sti-02-07-wrx-radiator-shroud-black-psp-eng-501bk-3013520.jpg?v=1770329479&width=220)
![Perrin [04 - 07 STI, 02 - 07 WRX] Radiator Shroud - Black | PSP - ENG - 501BK - JDMuscleRadiator ShroudsperPSP-ENG-501BK](http://jdmuscleusa.com/cdn/shop/products/perrin-04-07-sti-02-07-wrx-radiator-shroud-black-psp-eng-501bk-9909940.jpg?v=1770329479&width=220)
