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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In StockFactionFab MAF Sensor Replacement O ring
Fits: 02-07 WRX, 04-07 STI
Only 14 leftRegular price $7.00Sale price $7.00 Regular priceUnit price per$7.00 -
In StockFactionFab Subaru Timing Belt Guide EJ Motors
Only 6 leftRegular price $45.00Sale price $45.00 Regular priceUnit price per$45.00 -
In StockFactionFab MLS Subaru EJ Exhaust Manifold to Up-Pipe Gasket
Only 11 leftRegular price $14.00Sale price $14.00 Regular priceUnit price per$14.00 -
FactionFab MLS Subaru EJ Up-Pipe to Turbo Gasket
Regular price $15.00Sale price $15.00 Regular priceUnit price per$15.00 -
In StockOVERTAKE Silicone Turbo Inlet Hose
Fits: 04-21 STI, 02-07 WRX, 04-08 FXT
Regular price $280.00Sale price $280.00 Regular priceUnit price per$280.00 -
![OVERTAKE [04 - 21 STI, 06 - 07 WRX] Drive - By - Wire Throttle Body Gasket - Subaru EJ - JDMuscleGasketsA10479](//jdmuscleusa.com/cdn/shop/files/overtake-04-21-sti-06-07-wrx-drive-by-wire-throttle-body-gasket-subaru-ej-9296133.jpg?v=1770312010&width=220)
OVERTAKE Drive-By-Wire Throttle Body Gasket - Subaru EJ
Fits: 04-21 STI, 06-07 WRX
Regular price $9.00Sale price $9.00 Regular priceUnit price per -
![Cobb [06 - 07 WRX, 04 - 07 STI, 04 - 08 Forester XT] Stage 1 Power Package w/V3 Accessport - JDMuscleEngine Package Dealscobb613X01](//jdmuscleusa.com/cdn/shop/products/cobb-06-07-wrx-04-07-sti-04-08-forester-xt-stage-1-power-package-wv3-accessport-7646020.jpg?v=1770336335&width=220)
![Cobb [06 - 07 WRX, 04 - 07 STI, 04 - 08 Forester XT] Stage 1 Power Package w/V3 Accessport - JDMuscleEngine Package Dealscobb613X01](//jdmuscleusa.com/cdn/shop/products/cobb-06-07-wrx-04-07-sti-04-08-forester-xt-stage-1-power-package-wv3-accessport-3524411.jpg?v=1770336335&width=220)
In StockCobb Stage 1 Power Package w/V3 Accessport
Fits: 06-07 WRX, 04-07 STI, 04-08 Forester XT
Only 5 leftRegular price $765.00Sale price $765.00 Regular priceUnit price per$765.00 -
![Cobb [02 - 07 WRX, 04 - 07 STI] SF Airbox Replacement Hardware for - JDMuscleIntakescobb712150-HW](//jdmuscleusa.com/cdn/shop/products/cobb-02-07-wrx-04-07-sti-sf-airbox-replacement-hardware-for-3323819.jpg?v=1770336266&width=220)
Cobb SF Airbox Replacement Hardware for
Fits: 02-07 WRX, 04-07 STI
Regular price $16.00Sale price $16.00 Regular priceUnit price per$16.00 -
In StockOVERTAKE Radiator Hose Kit - Subaru 2002-2007 WRX / Impreza, 2004-2007 STI
Only 17 leftRegular price $109.00Sale price $109.00 Regular priceUnit price per$109.00 -
![Cobb [04 - 21 STI Incl. Type RA/S209, 06 - 14 WRX, 06 - 13 FXT] 2in. Stainless Steep Up - Pipe - JDMuscleTurbo Uppipescobb512265](//jdmuscleusa.com/cdn/shop/files/cobb-04-21-sti-incl-type-ras209-06-14-wrx-06-13-fxt-2in-stainless-steep-up-pipe-5145936.webp?v=1770321317&width=220)
![Cobb [04 - 21 STI Incl. Type RA/S209, 06 - 14 WRX, 06 - 13 FXT] 2in. Stainless Steep Up - Pipe - JDMuscleTurbo Uppipescobb512265](//jdmuscleusa.com/cdn/shop/files/cobb-04-21-sti-incl-type-ras209-06-14-wrx-06-13-fxt-2in-stainless-steep-up-pipe-2357880.webp?v=1770321317&width=220)
In StockCobb 2in. Stainless Steep Up-Pipe
Fits: 04-21 STI Incl. Type RA/S209, 06-14 WRX, 06-13 FXT
Regular price $275.00Sale price $275.00 Regular priceUnit price per$275.00 -
![Cobb [Subaru STI] 6MT Stage 1+ Drivetrain Package - JDMuscleEngine Package Dealscobb215X01P-W-BK](//jdmuscleusa.com/cdn/shop/files/cobb-subaru-sti-6mt-stage-1-drivetrain-package-4281310.webp?v=1770318268&width=220)
![Cobb [Subaru STI] 6MT Stage 1+ Drivetrain Package - JDMuscleEngine Package Dealscobb215X01P-W-BK](//jdmuscleusa.com/cdn/shop/files/cobb-subaru-sti-6mt-stage-1-drivetrain-package-9844102.webp?v=1770318268&width=220)
In StockCobb 6MT Stage 1+ Drivetrain Package
Fits: Subaru STI
Only 4 leftRegular price $375.00Sale price $375.00 Regular priceUnit price per$375.00 -
![Cobb [Subaru STI] 6MT Stage 1+ Drivetrain Package - JDMuscleEngine Package Dealscobb215X01P-W-RD](//jdmuscleusa.com/cdn/shop/files/cobb-subaru-sti-6mt-stage-1-drivetrain-package-8750611.webp?v=1770318269&width=220)
![Cobb [Subaru STI] 6MT Stage 1+ Drivetrain Package - JDMuscleEngine Package Dealscobb215X01P-W-RD](//jdmuscleusa.com/cdn/shop/files/cobb-subaru-sti-6mt-stage-1-drivetrain-package-1103748.webp?v=1770318269&width=220)
In StockCobb 6MT Stage 1+ Drivetrain Package
Fits: Subaru STI
Only 4 leftRegular price $375.00Sale price $375.00 Regular priceUnit price per$375.00 -
Invidia Up-Pipe - Subaru Models (Inc. 06-14 WRX / 04-21 STI) | INVHS02SW1UPP
Regular price $290.65Sale price $290.65 Regular priceUnit price per -
![Cobb [02 - 14 WRX, 04 - 14 STI] Main Pulley/Oil Cap/Battery Tie Down Package - Teal - JDMusclePulleyscobbSUB00003AQ](//jdmuscleusa.com/cdn/shop/files/cobb-02-14-wrx-04-14-sti-main-pulleyoil-capbattery-tie-down-package-teal-2239562.jpg?v=1770321307&width=220)
Cobb Main Pulley/Oil Cap/Battery Tie Down Package - Teal
Fits: 02-14 WRX, 04-14 STI
Regular price $226.00Sale price $226.00 Regular priceUnit price per$226.00 -
![Cusco [02-05 WRX/STI] Radiator Cooling Plate Blue | 667 003 AL](//jdmuscleusa.com/cdn/shop/files/0a400ffb3789c6bb8de78068f9784e2c.webp?v=1754768701&width=220)
Up to $13.10 offCusco Radiator Cooling Plate Blue | 667 003 AL
Fits: 02-05 WRX/STI
Regular price $117.90Sale price $117.90 Regular priceUnit price per$131.00 -
![Torque Solution [06 - 21 STI, 08 - 14 WRX] Big Bore 76mm Throttle Body Adapter - Silver | TS - SU - 870O - S - JDMuscleIntake Misc.tqsTS-SU-870O-S](//jdmuscleusa.com/cdn/shop/files/torque-solution-06-21-sti-08-14-wrx-big-bore-76mm-throttle-body-adapter-silver-ts-su-870o-s-2764464.webp?v=1770321806&width=220)
![Torque Solution [06 - 21 STI, 08 - 14 WRX] Big Bore 76mm Throttle Body Adapter - Silver | TS - SU - 870O - S - JDMuscleIntake Misc.tqsTS-SU-870O-S](//jdmuscleusa.com/cdn/shop/files/torque-solution-06-21-sti-08-14-wrx-big-bore-76mm-throttle-body-adapter-silver-ts-su-870o-s-8198014.webp?v=1770321806&width=220)
Up to $13.88 offTorque Solution Big Bore 76mm Throttle Body Adapter-Silver | TS-SU-870O-S
Fits: 06-21 STI, 08-14 WRX
Regular price $75.00Sale price $75.00 Regular priceUnit price per$88.88
![OVERTAKE [04 - 21 STI, 06 - 07 WRX] Drive - By - Wire Throttle Body Gasket - Subaru EJ - JDMuscleGasketsA10479](http://jdmuscleusa.com/cdn/shop/files/overtake-04-21-sti-06-07-wrx-drive-by-wire-throttle-body-gasket-subaru-ej-9296133.jpg?v=1770312010&width=220)
![Cobb [06 - 07 WRX, 04 - 07 STI, 04 - 08 Forester XT] Stage 1 Power Package w/V3 Accessport - JDMuscleEngine Package Dealscobb613X01](http://jdmuscleusa.com/cdn/shop/products/cobb-06-07-wrx-04-07-sti-04-08-forester-xt-stage-1-power-package-wv3-accessport-7646020.jpg?v=1770336335&width=220)
![Cobb [06 - 07 WRX, 04 - 07 STI, 04 - 08 Forester XT] Stage 1 Power Package w/V3 Accessport - JDMuscleEngine Package Dealscobb613X01](http://jdmuscleusa.com/cdn/shop/products/cobb-06-07-wrx-04-07-sti-04-08-forester-xt-stage-1-power-package-wv3-accessport-3524411.jpg?v=1770336335&width=220)
![Cobb [02 - 07 WRX, 04 - 07 STI] SF Airbox Replacement Hardware for - JDMuscleIntakescobb712150-HW](http://jdmuscleusa.com/cdn/shop/products/cobb-02-07-wrx-04-07-sti-sf-airbox-replacement-hardware-for-3323819.jpg?v=1770336266&width=220)
![Cobb [04 - 21 STI Incl. Type RA/S209, 06 - 14 WRX, 06 - 13 FXT] 2in. Stainless Steep Up - Pipe - JDMuscleTurbo Uppipescobb512265](http://jdmuscleusa.com/cdn/shop/files/cobb-04-21-sti-incl-type-ras209-06-14-wrx-06-13-fxt-2in-stainless-steep-up-pipe-5145936.webp?v=1770321317&width=220)
![Cobb [04 - 21 STI Incl. Type RA/S209, 06 - 14 WRX, 06 - 13 FXT] 2in. Stainless Steep Up - Pipe - JDMuscleTurbo Uppipescobb512265](http://jdmuscleusa.com/cdn/shop/files/cobb-04-21-sti-incl-type-ras209-06-14-wrx-06-13-fxt-2in-stainless-steep-up-pipe-2357880.webp?v=1770321317&width=220)
![Cobb [Subaru STI] 6MT Stage 1+ Drivetrain Package - JDMuscleEngine Package Dealscobb215X01P-W-BK](http://jdmuscleusa.com/cdn/shop/files/cobb-subaru-sti-6mt-stage-1-drivetrain-package-4281310.webp?v=1770318268&width=220)
![Cobb [Subaru STI] 6MT Stage 1+ Drivetrain Package - JDMuscleEngine Package Dealscobb215X01P-W-BK](http://jdmuscleusa.com/cdn/shop/files/cobb-subaru-sti-6mt-stage-1-drivetrain-package-9844102.webp?v=1770318268&width=220)
![Cobb [Subaru STI] 6MT Stage 1+ Drivetrain Package - JDMuscleEngine Package Dealscobb215X01P-W-RD](http://jdmuscleusa.com/cdn/shop/files/cobb-subaru-sti-6mt-stage-1-drivetrain-package-8750611.webp?v=1770318269&width=220)
![Cobb [Subaru STI] 6MT Stage 1+ Drivetrain Package - JDMuscleEngine Package Dealscobb215X01P-W-RD](http://jdmuscleusa.com/cdn/shop/files/cobb-subaru-sti-6mt-stage-1-drivetrain-package-1103748.webp?v=1770318269&width=220)
![Cobb [02 - 14 WRX, 04 - 14 STI] Main Pulley/Oil Cap/Battery Tie Down Package - Teal - JDMusclePulleyscobbSUB00003AQ](http://jdmuscleusa.com/cdn/shop/files/cobb-02-14-wrx-04-14-sti-main-pulleyoil-capbattery-tie-down-package-teal-2239562.jpg?v=1770321307&width=220)
![Cusco [02-05 WRX/STI] Radiator Cooling Plate Blue | 667 003 AL](http://jdmuscleusa.com/cdn/shop/files/0a400ffb3789c6bb8de78068f9784e2c.webp?v=1754768701&width=220)
![Torque Solution [06 - 21 STI, 08 - 14 WRX] Big Bore 76mm Throttle Body Adapter - Silver | TS - SU - 870O - S - JDMuscleIntake Misc.tqsTS-SU-870O-S](http://jdmuscleusa.com/cdn/shop/files/torque-solution-06-21-sti-08-14-wrx-big-bore-76mm-throttle-body-adapter-silver-ts-su-870o-s-2764464.webp?v=1770321806&width=220)
![Torque Solution [06 - 21 STI, 08 - 14 WRX] Big Bore 76mm Throttle Body Adapter - Silver | TS - SU - 870O - S - JDMuscleIntake Misc.tqsTS-SU-870O-S](http://jdmuscleusa.com/cdn/shop/files/torque-solution-06-21-sti-08-14-wrx-big-bore-76mm-throttle-body-adapter-silver-ts-su-870o-s-8198014.webp?v=1770321806&width=220)