Optimize your Subaru STI 2004-2007 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.
Subaru STI 2004-2007 Engine Parts
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Injector Dynamics Fuel Injectors 1700cc w/ Top Feed Fuel Rails Subaru STI 2004-2006 / Legacy GT 2005-2006 | 1700.18.01.48.14.4
Regular price $1,417.50Sale price $1,417.50 Regular priceUnit price per$1,417.50 -
In StockInjector Dynamics ID2600-XDS Fuel Injectors Top Feed Conversion Kit Subaru STI 2004-2006 | 2600.18.01.48.14.4
Only 1 leftRegular price $1,813.35Sale price $1,813.35 Regular priceUnit price per$1,813.35 -
MagnaFlow Converters Direct-Fit WRX 2004-2007 / STI 2.5L T 2004-2007 | 49984
Regular price $522.00Sale price $522.00 Regular priceUnit price per$522.00 -
Up to $50 offAEM Short Ram Intake System Red WRX 2002-2006 / STi 2002-2006 | 22-474R
Regular price $249.99Sale price $249.99 Regular priceUnit price per$299.99 -
Up to $50 offAEM Short Ram Intake System Blue WRX 2002-2006 / STi 2002-2006 | 22-474B
Regular price $299.99Sale price $299.99 Regular priceUnit price per$349.99 -
![Cobb [04 - 07 WRX/STI] Front Mount Intercooler Core Silver - JDMuscleIntercoolerscobb712502-SL](//jdmuscleusa.com/cdn/shop/products/cobb-04-07-wrxsti-front-mount-intercooler-core-silver-4811597.jpg?v=1770336133&width=220)
![Cobb [04 - 07 WRX/STI] Front Mount Intercooler Core Silver - JDMuscleIntercoolerscobb712502-SL](//jdmuscleusa.com/cdn/shop/products/cobb-04-07-wrxsti-front-mount-intercooler-core-silver-2786605.jpg?v=1770336133&width=220)
Cobb Front Mount Intercooler Core Silver
Fits: 04-07 WRX/STI
Regular price $1,125.00Sale price $1,125.00 Regular priceUnit price per$1,125.00 -
![Cobb [04 - 07 WRX/STI] Front Mount Intercooler Core Black - JDMuscleIntercoolerscobb712502-BK](//jdmuscleusa.com/cdn/shop/products/cobb-04-07-wrxsti-front-mount-intercooler-core-black-7186426.jpg?v=1770336261&width=220)
![Cobb [04 - 07 WRX/STI] Front Mount Intercooler Core Black - JDMuscleIntercoolerscobb712502-BK](//jdmuscleusa.com/cdn/shop/products/cobb-04-07-wrxsti-front-mount-intercooler-core-black-9478704.jpg?v=1770336261&width=220)
In StockCobb Front Mount Intercooler Core Black
Fits: 04-07 WRX/STI
Only 10 leftRegular price $1,125.00Sale price $1,125.00 Regular priceUnit price per$1,125.00 -
![Cobb [02 - 07 WRX/STI, 04 - 08 Forester XT] SF Intake System Hardware Kit - JDMuscleIntakescobb712100-HW](//jdmuscleusa.com/cdn/shop/products/cobb-02-07-wrxsti-04-08-forester-xt-sf-intake-system-hardware-kit-6568568.jpg?v=1770336265&width=220)
In StockCobb SF Intake System Hardware Kit
Fits: 02-07 WRX/STI, 04-08 Forester XT
Only 4 leftRegular price $16.00Sale price $16.00 Regular priceUnit price per$16.00 -
![Cobb [04 - 07 STI/WRX] Front Mount Intercooler Hot Pipes - JDMuscleIntercooler Piping Kitscobb712500-H](//jdmuscleusa.com/cdn/shop/products/cobb-04-07-stiwrx-front-mount-intercooler-hot-pipes-4559626.jpg?v=1770336268&width=220)
![Cobb [04 - 07 STI/WRX] Front Mount Intercooler Hot Pipes - JDMuscleIntercooler Piping Kitscobb712500-H](//jdmuscleusa.com/cdn/shop/products/cobb-04-07-stiwrx-front-mount-intercooler-hot-pipes-3511030.jpg?v=1770336268&width=220)
In StockCobb Front Mount Intercooler Hot Pipes
Fits: 04-07 STI/WRX
Only 7 leftRegular price $375.00Sale price $375.00 Regular priceUnit price per$375.00 -
![Cobb [04 - 07 STI/WRX] Front Mount Intercooler Cold Pipes - JDMuscleIntercooler Piping Kitscobb712500-C](//jdmuscleusa.com/cdn/shop/products/cobb-04-07-stiwrx-front-mount-intercooler-cold-pipes-6744521.jpg?v=1770336319&width=220)
![Cobb [04 - 07 STI/WRX] Front Mount Intercooler Cold Pipes - JDMuscleIntercooler Piping Kitscobb712500-C](//jdmuscleusa.com/cdn/shop/products/cobb-04-07-stiwrx-front-mount-intercooler-cold-pipes-2822767.jpg?v=1770336319&width=220)
In StockCobb Front Mount Intercooler Cold Pipes
Fits: 04-07 STI/WRX
Only 7 leftRegular price $430.00Sale price $430.00 Regular priceUnit price per$430.00 -
![Cobb [04 - 07 STI/WRX] Coolant Overflow Tank w/ Washer Fluid Relocation Kit - JDMuscleOverflow / Expansion Tankscobb800630](//jdmuscleusa.com/cdn/shop/products/cobb-04-07-stiwrx-coolant-overflow-tank-w-washer-fluid-relocation-kit-3557463.jpg?v=1770336328&width=220)
![Cobb [04 - 07 STI/WRX] Coolant Overflow Tank w/ Washer Fluid Relocation Kit - JDMuscleOverflow / Expansion Tankscobb800630](//jdmuscleusa.com/cdn/shop/products/cobb-04-07-stiwrx-coolant-overflow-tank-w-washer-fluid-relocation-kit-2482113.jpg?v=1770336328&width=220)
In StockCobb Coolant Overflow Tank w/ Washer Fluid Relocation Kit
Fits: 04-07 STI/WRX
Only 11 leftRegular price $260.00Sale price $260.00 Regular priceUnit price per$260.00 -
![Cobb [07 STI] Flex Fuel Package 5 Pin - JDMuscleFlex FuelcobbSUBFFGD002](//jdmuscleusa.com/cdn/shop/products/cobb-07-sti-flex-fuel-package-5-pin-8299281.jpg?v=1770336328&width=220)
![Cobb [07 STI] Flex Fuel Package 5 Pin - JDMuscleFlex FuelcobbSUBFFGD002](//jdmuscleusa.com/cdn/shop/products/cobb-07-sti-flex-fuel-package-5-pin-4920748.jpg?v=1770336329&width=220)
Cobb Flex Fuel Package 5 Pin
Fits: 07 STI
Regular price $875.00Sale price $875.00 Regular priceUnit price per$875.00 -
![Cobb [06 - 07 WRX, 04 - 07 STI, 04 - 08 FXT] Air Oil Separator - JDMuscleAir Oil Separatorscobb811615](//jdmuscleusa.com/cdn/shop/products/cobb-06-07-wrx-04-07-sti-04-08-fxt-air-oil-separator-5379599.jpg?v=1770336369&width=220)
![Cobb [06 - 07 WRX, 04 - 07 STI, 04 - 08 FXT] Air Oil Separator - JDMuscleAir Oil Separatorscobb811615](//jdmuscleusa.com/cdn/shop/products/cobb-06-07-wrx-04-07-sti-04-08-fxt-air-oil-separator-5354469.jpg?v=1770336369&width=220)
In StockCobb Air Oil Separator
Fits: 06-07 WRX, 04-07 STI, 04-08 FXT
Only 8 leftRegular price $565.00Sale price $565.00 Regular priceUnit price per$565.00 -
![Cobb [04 - 16 STI, 06 - 21] WRX AN Adapter Fittings - JDMuscleEngine Management Sensorscobb312630](//jdmuscleusa.com/cdn/shop/products/cobb-04-16-sti-06-21-wrx-an-adapter-fittings-3943173.jpg?v=1770336368&width=220)
![Cobb [04 - 16 STI, 06 - 21] WRX AN Adapter Fittings - JDMuscleEngine Management Sensorscobb312630](//jdmuscleusa.com/cdn/shop/files/cobb-04-16-sti-06-21-wrx-an-adapter-fittings-8477907.webp?v=1770336368&width=220)
In StockCobb AN Adapter Fittings
Fits: 04-16 STI, 06-21 WRX
Only 7 leftRegular price $53.00Sale price $53.00 Regular priceUnit price per$53.00 -
In StockCobb Front Mount Intercooler Bypass Valve Adapter
Fits: 02-07 WRX, 04-21 STI
Only 14 leftRegular price $87.00Sale price $87.00 Regular priceUnit price per$87.00 -
Cobb MT Flex Fuel Package 3 Pin
Fits: 04-06 STI, 06-07 WRX
Regular price $875.00Sale price $875.00 Regular priceUnit price per$875.00
![Cobb [04 - 07 WRX/STI] Front Mount Intercooler Core Silver - JDMuscleIntercoolerscobb712502-SL](http://jdmuscleusa.com/cdn/shop/products/cobb-04-07-wrxsti-front-mount-intercooler-core-silver-4811597.jpg?v=1770336133&width=220)
![Cobb [04 - 07 WRX/STI] Front Mount Intercooler Core Silver - JDMuscleIntercoolerscobb712502-SL](http://jdmuscleusa.com/cdn/shop/products/cobb-04-07-wrxsti-front-mount-intercooler-core-silver-2786605.jpg?v=1770336133&width=220)
![Cobb [04 - 07 WRX/STI] Front Mount Intercooler Core Black - JDMuscleIntercoolerscobb712502-BK](http://jdmuscleusa.com/cdn/shop/products/cobb-04-07-wrxsti-front-mount-intercooler-core-black-7186426.jpg?v=1770336261&width=220)
![Cobb [04 - 07 WRX/STI] Front Mount Intercooler Core Black - JDMuscleIntercoolerscobb712502-BK](http://jdmuscleusa.com/cdn/shop/products/cobb-04-07-wrxsti-front-mount-intercooler-core-black-9478704.jpg?v=1770336261&width=220)
![Cobb [02 - 07 WRX/STI, 04 - 08 Forester XT] SF Intake System Hardware Kit - JDMuscleIntakescobb712100-HW](http://jdmuscleusa.com/cdn/shop/products/cobb-02-07-wrxsti-04-08-forester-xt-sf-intake-system-hardware-kit-6568568.jpg?v=1770336265&width=220)
![Cobb [04 - 07 STI/WRX] Front Mount Intercooler Hot Pipes - JDMuscleIntercooler Piping Kitscobb712500-H](http://jdmuscleusa.com/cdn/shop/products/cobb-04-07-stiwrx-front-mount-intercooler-hot-pipes-4559626.jpg?v=1770336268&width=220)
![Cobb [04 - 07 STI/WRX] Front Mount Intercooler Hot Pipes - JDMuscleIntercooler Piping Kitscobb712500-H](http://jdmuscleusa.com/cdn/shop/products/cobb-04-07-stiwrx-front-mount-intercooler-hot-pipes-3511030.jpg?v=1770336268&width=220)
![Cobb [04 - 07 STI/WRX] Front Mount Intercooler Cold Pipes - JDMuscleIntercooler Piping Kitscobb712500-C](http://jdmuscleusa.com/cdn/shop/products/cobb-04-07-stiwrx-front-mount-intercooler-cold-pipes-6744521.jpg?v=1770336319&width=220)
![Cobb [04 - 07 STI/WRX] Front Mount Intercooler Cold Pipes - JDMuscleIntercooler Piping Kitscobb712500-C](http://jdmuscleusa.com/cdn/shop/products/cobb-04-07-stiwrx-front-mount-intercooler-cold-pipes-2822767.jpg?v=1770336319&width=220)
![Cobb [04 - 07 STI/WRX] Coolant Overflow Tank w/ Washer Fluid Relocation Kit - JDMuscleOverflow / Expansion Tankscobb800630](http://jdmuscleusa.com/cdn/shop/products/cobb-04-07-stiwrx-coolant-overflow-tank-w-washer-fluid-relocation-kit-3557463.jpg?v=1770336328&width=220)
![Cobb [04 - 07 STI/WRX] Coolant Overflow Tank w/ Washer Fluid Relocation Kit - JDMuscleOverflow / Expansion Tankscobb800630](http://jdmuscleusa.com/cdn/shop/products/cobb-04-07-stiwrx-coolant-overflow-tank-w-washer-fluid-relocation-kit-2482113.jpg?v=1770336328&width=220)
![Cobb [07 STI] Flex Fuel Package 5 Pin - JDMuscleFlex FuelcobbSUBFFGD002](http://jdmuscleusa.com/cdn/shop/products/cobb-07-sti-flex-fuel-package-5-pin-8299281.jpg?v=1770336328&width=220)
![Cobb [07 STI] Flex Fuel Package 5 Pin - JDMuscleFlex FuelcobbSUBFFGD002](http://jdmuscleusa.com/cdn/shop/products/cobb-07-sti-flex-fuel-package-5-pin-4920748.jpg?v=1770336329&width=220)
![Cobb [06 - 07 WRX, 04 - 07 STI, 04 - 08 FXT] Air Oil Separator - JDMuscleAir Oil Separatorscobb811615](http://jdmuscleusa.com/cdn/shop/products/cobb-06-07-wrx-04-07-sti-04-08-fxt-air-oil-separator-5379599.jpg?v=1770336369&width=220)
![Cobb [06 - 07 WRX, 04 - 07 STI, 04 - 08 FXT] Air Oil Separator - JDMuscleAir Oil Separatorscobb811615](http://jdmuscleusa.com/cdn/shop/products/cobb-06-07-wrx-04-07-sti-04-08-fxt-air-oil-separator-5354469.jpg?v=1770336369&width=220)
![Cobb [04 - 16 STI, 06 - 21] WRX AN Adapter Fittings - JDMuscleEngine Management Sensorscobb312630](http://jdmuscleusa.com/cdn/shop/products/cobb-04-16-sti-06-21-wrx-an-adapter-fittings-3943173.jpg?v=1770336368&width=220)
![Cobb [04 - 16 STI, 06 - 21] WRX AN Adapter Fittings - JDMuscleEngine Management Sensorscobb312630](http://jdmuscleusa.com/cdn/shop/files/cobb-04-16-sti-06-21-wrx-an-adapter-fittings-8477907.webp?v=1770336368&width=220)
