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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![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)
In StockIAG 8mm Thick Phenolic Spacers
Fits: 02-14 WRX, 04-21 STI, 05-12 LGT, 04-13 FXT
Only 1 leftRegular price $74.99Sale price $74.99 Regular priceUnit price per$74.99 -
In StockIAG 02-14 WRX, 04-21 STI, 05-09 LGT, 04-13 FXT 550 Street Cylinder Heads Package | IAG-ENG-H550NE
Only 1 leftRegular price $3,399.99Sale price $3,399.99 Regular priceUnit price per$3,399.99 -
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 17 leftRegular price $399.92Sale price $399.92 Regular priceUnit price per$470.49 -
In StockIAG 02-14 WRX / 04-21 STI / 05-12 LGT / 05-09 Outback XT / 04-13 FXT Stage 2 CNC Ported 11mm Oil Pump | IAG-ENG-2240
Only 1 leftRegular price $479.99Sale price $479.99 Regular priceUnit price per$479.99 -
In StockIAG Performance 02-14 WRX / 04-21 STI / 05-09 LGT / 04-13 FXT Oil Control Baffle / Windage Tray Combo | IAG-ENG-2087
Only 2 leftRegular price From $199.99Sale price From $199.99 Regular priceUnit price per$199.99 -
IAG Stage 2 2.5L Subaru Short Block for Subaru Multiple Fitments
Regular price $4,955.41Sale price $4,955.41 Regular priceUnit price per$3,925.98 -
IAG Performance V2 Oil Pickup
Fits: 02-14 WRX, 04-21 STI, 05-09 LGT, 04-13 FXT
Regular price $149.99Sale price $149.99 Regular priceUnit price per$149.99 -
In StockCobb Tuning Subaru Oil Cap - Stealth Black
Fits: 15-26 WRX, 15-21 WRX STI, 13-26 BRZ, 02-14 Impreza, 04-13 Forester XT, 05-12 Legacy GT, 05-09 Outback XT, 20-25 Legacy XT/Sport, 20-26 Outback XT/Wilderness
Only 7 leftRegular price $96.00Sale price $96.00 Regular priceUnit price per$96.00 -
In StockCobb Tuning Turbo Blanket - Subaru EJ Stock
Fits: 02-14 WRX, 04-21 STI, 04-13 Forester XT, 05-09 Legacy GT, 05-09 Outback XT
Regular price $198.00Sale price $198.00 Regular priceUnit price per$198.00 -
![Cobb [02 - 07 WRX, 04 - 07 STI, 04 - 08 FXT] SF Airbox | 712160 - JDMuscleAir Boxescobb712160](//jdmuscleusa.com/cdn/shop/products/cobb-02-07-wrx-04-07-sti-04-08-fxt-sf-airbox-712160-9004082.jpg?v=1770336382&width=220)
![Cobb [02 - 07 WRX, 04 - 07 STI, 04 - 08 FXT] SF Airbox | 712160 - JDMuscleAir Boxescobb712160](//jdmuscleusa.com/cdn/shop/products/cobb-02-07-wrx-04-07-sti-04-08-fxt-sf-airbox-712160-6380881.jpg?v=1770336382&width=220)
In StockCobb Tuning SF Airbox - Wrinkle Black
Fits: 02-07 WRX, 04-07 STI, 04-08 Forester XT
Regular price $207.00Sale price $207.00 Regular priceUnit price per$207.00 -
In StockCobb Tuning Initialization Connector
Fits: 02 WRX
Only 18 leftRegular price $17.00Sale price $17.00 Regular priceUnit price per$17.00 -
![COBB [02 - 07 WRX, 04 - 21 STI, 04 - 08 FXT] Turbo Heat Shield | 512510 - JDMuscleExhaust Heat Shieldscobb512510](//jdmuscleusa.com/cdn/shop/products/cobb-02-07-wrx-04-21-sti-04-08-fxt-turbo-heat-shield-512510-9973074.jpg?v=1770336438&width=220)
![COBB [02 - 07 WRX, 04 - 21 STI, 04 - 08 FXT] Turbo Heat Shield | 512510 - JDMuscleExhaust Heat Shieldscobb512510](//jdmuscleusa.com/cdn/shop/products/cobb-02-07-wrx-04-21-sti-04-08-fxt-turbo-heat-shield-512510-8795408.jpg?v=1770336438&width=220)
In StockCobb Tuning Turbo Heat Shield - Stainless Steel
Fits: 02-07 WRX, 04-21 STI, 04-08 Forester XT
Only 16 leftRegular price $101.00Sale price $101.00 Regular priceUnit price per$101.00 -
![Cobb Tuning [02 - 07 WRX, 04 - 07 STI, 04 - 08 FXT] SF Short Ram Intake | 712100 - JDMuscleIntakescobb712100](//jdmuscleusa.com/cdn/shop/products/cobb-tuning-02-07-wrx-04-07-sti-04-08-fxt-sf-short-ram-intake-712100-3226437.jpg?v=1770336437&width=220)
In StockCobb Tuning SF Short Ram Intake
Fits: 02-07 WRX, 04-07 STI, 04-08 Forester XT
Regular price $290.00Sale price $290.00 Regular priceUnit price per$290.00 -
TR Twin Scroll High Flow Catless Downpipe | TR-ES1005
Fits: 02-07 WRX, 04-07 STI
Regular price $710.00Sale price $710.00 Regular priceUnit price per$620.00 -
Torque Solution TMIC Stud Kit WRX 2002-2007 / STI 2004-21 | TS-SU-TSK
Regular price $18.00Sale price $18.00 Regular priceUnit price per$18.00 -
![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 7 leftRegular price $220.99Sale price $220.99 Regular priceUnit price per$220.99
![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)
![Cobb [02 - 07 WRX, 04 - 07 STI, 04 - 08 FXT] SF Airbox | 712160 - JDMuscleAir Boxescobb712160](http://jdmuscleusa.com/cdn/shop/products/cobb-02-07-wrx-04-07-sti-04-08-fxt-sf-airbox-712160-9004082.jpg?v=1770336382&width=220)
![Cobb [02 - 07 WRX, 04 - 07 STI, 04 - 08 FXT] SF Airbox | 712160 - JDMuscleAir Boxescobb712160](http://jdmuscleusa.com/cdn/shop/products/cobb-02-07-wrx-04-07-sti-04-08-fxt-sf-airbox-712160-6380881.jpg?v=1770336382&width=220)
![COBB [02 - 07 WRX, 04 - 21 STI, 04 - 08 FXT] Turbo Heat Shield | 512510 - JDMuscleExhaust Heat Shieldscobb512510](http://jdmuscleusa.com/cdn/shop/products/cobb-02-07-wrx-04-21-sti-04-08-fxt-turbo-heat-shield-512510-9973074.jpg?v=1770336438&width=220)
![COBB [02 - 07 WRX, 04 - 21 STI, 04 - 08 FXT] Turbo Heat Shield | 512510 - JDMuscleExhaust Heat Shieldscobb512510](http://jdmuscleusa.com/cdn/shop/products/cobb-02-07-wrx-04-21-sti-04-08-fxt-turbo-heat-shield-512510-8795408.jpg?v=1770336438&width=220)
![Cobb Tuning [02 - 07 WRX, 04 - 07 STI, 04 - 08 FXT] SF Short Ram Intake | 712100 - JDMuscleIntakescobb712100](http://jdmuscleusa.com/cdn/shop/products/cobb-tuning-02-07-wrx-04-07-sti-04-08-fxt-sf-short-ram-intake-712100-3226437.jpg?v=1770336437&width=220)
![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)