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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![aFe [02 - 07 WRX, 04 - 07 STI] MagnumFLOW Air Filters Pro 5R | 30 - 10010 - JDMuscleHigh Flow Replacement Panel Filtersafe30-10010](//jdmuscleusa.com/cdn/shop/files/afe-02-07-wrx-04-07-sti-magnumflow-air-filters-pro-5r-30-10010-5945465.jpg?v=1770321854&width=220)
![aFe [02 - 07 WRX, 04 - 07 STI] MagnumFLOW Air Filters Pro 5R | 30 - 10010 - JDMuscleHigh Flow Replacement Panel Filtersafe30-10010](//jdmuscleusa.com/cdn/shop/files/afe-02-07-wrx-04-07-sti-magnumflow-air-filters-pro-5r-30-10010-1292642.jpg?v=1770321854&width=220)
In StockaFe MagnumFLOW Air Filters Pro 5R | 30-10010
Fits: 02-07 WRX, 04-07 STI
Only 7 leftRegular price $71.00Sale price $71.00 Regular priceUnit price per$71.00 -
![Torque Solution [02-07 WRX, 04-21 STI, 04-08 FXT] Turbo Inlet Hose - Black | TS-SU-463BK](//jdmuscleusa.com/cdn/shop/products/torque-solution-turbo-inlet-hose-black-02-07-subaru-wrx-04-19-sti-05-09-legacy-gt-04-13-ftx-turbo-inlet-hoses-and-pipes-torque-solution-tqsts-su-463bk.jpg?v=1614518827&width=220)
Up to $33.77 off
In StockTorque Solution Turbo Inlet Hose - Black | TS-SU-463BK
Fits: 02-07 WRX, 04-21 STI, 04-08 FXT
Only 4 leftRegular price $244.00Sale price $244.00 Regular priceUnit price per$277.77 -
![HPS [02 - 07 WRX, 04 - 07 STI] Performance Cold Air Intake w/ Heatshield - Red | 827 - 606R - JDMuscleIntakesHPS827-606R](//jdmuscleusa.com/cdn/shop/files/hps-02-07-wrx-04-07-sti-performance-cold-air-intake-w-heatshield-red-827-606r-2134333.jpg?v=1770321854&width=220)
Up to $8 offHPS Performance Cold Air Intake w/ Heatshield - Red | 827-606R
Fits: 02-07 WRX, 04-07 STI
Regular price $246.00Sale price $246.00 Regular priceUnit price per$254.00 -
![IAG Performance [02 - 07 WRX, 04 - 07 STI, 04 - 08 FXT] BIG MAF Intake | IAG - AFD - 1100 - JDMuscleIntakesIAG-AFD-1100](//jdmuscleusa.com/cdn/shop/files/iag-performance-02-07-wrx-04-07-sti-04-08-fxt-big-maf-intake-iag-afd-1100-3442712.jpg?v=1770321854&width=220)
![IAG Performance [02 - 07 WRX, 04 - 07 STI, 04 - 08 FXT] BIG MAF Intake | IAG - AFD - 1100 - JDMuscleIntakesIAG-AFD-1100](//jdmuscleusa.com/cdn/shop/files/iag-performance-02-07-wrx-04-07-sti-04-08-fxt-big-maf-intake-iag-afd-1100-2477693.jpg?v=1770321854&width=220)
IAG Performance BIG MAF Intake
Fits: 02-07 WRX, 04-07 STI, 04-08 FXT
Regular price $274.99Sale price $274.99 Regular priceUnit price per$274.99 -
![HKS [02 - 07 WRX, 04 - 07 STI, 04 - 08 FXT] Super Power Flow Intake System | 70019 - AF103 - JDMuscleIntakeshks70019-AF103](//jdmuscleusa.com/cdn/shop/files/hks-02-07-wrx-04-07-sti-04-08-fxt-super-power-flow-intake-system-70019-af103-2671610.jpg?v=1770321854&width=220)
![HKS [02-07 WRX, 04-07 STI, 04-08 FXT] Super Power Flow Intake System | 70019-AF103](//jdmuscleusa.com/cdn/shop/files/63d46fbdf305dcfb15494b8cc2f2d993.gif?v=1746808937&width=220)
In StockHKS Super Power Flow Intake System | 70019-AF103
Fits: 02-07 WRX, 04-07 STI, 04-08 FXT
Only 4 leftRegular price $220.00Sale price $220.00 Regular priceUnit price per$220.00 -
![HPS Performance [02 - 07 WRX, 04 - 07 STI] Performance Short Ram Air Intake w/ Heat Shield - Black | 827 - 606WB - JDMuscleIntakesHPS827-606WB](//jdmuscleusa.com/cdn/shop/files/hps-performance-02-07-wrx-04-07-sti-performance-short-ram-air-intake-w-heat-shield-black-827-606wb-8559662.jpg?v=1770329176&width=220)
![HPS Performance [02 - 07 WRX, 04 - 07 STI] Performance Short Ram Air Intake w/ Heat Shield - Black | 827 - 606WB - JDMuscleIntakesHPS827-606WB](//jdmuscleusa.com/cdn/shop/files/hps-performance-02-07-wrx-04-07-sti-performance-short-ram-air-intake-w-heat-shield-black-827-606wb-3099378.jpg?v=1770329176&width=220)
Up to $8 offHPS Performance Performance Short Ram Air Intake w/ Heat Shield - Black | 827-606WB
Fits: 02-07 WRX, 04-07 STI
Regular price $246.00Sale price $246.00 Regular priceUnit price per$254.00 -
![HKS [02 - 07 WRX, 04 - 07 STI, 04 - 08 FXT] Racing Suction Intake System | 70020 - AF101 - JDMuscleIntakesHKS70020-AF101](//jdmuscleusa.com/cdn/shop/files/hks-02-07-wrx-04-07-sti-04-08-fxt-racing-suction-intake-system-70020-af101-1747881.jpg?v=1770321854&width=220)
In StockHKS Racing Suction Intake System | 70020-AF101
Fits: 02-07 WRX, 04-07 STI, 04-08 FXT
Only 5 leftRegular price $374.00Sale price $374.00 Regular priceUnit price per$374.00 -
![aFe [02 - 07 WRX, 04 - 07 STI] MagnumFLOW Air Filter | 31 - 10010 - JDMuscleHigh Flow Replacement Panel Filtersafe31-10010](//jdmuscleusa.com/cdn/shop/files/afe-02-07-wrx-04-07-sti-magnumflow-air-filter-31-10010-9892314.jpg?v=1770321855&width=220)
![aFe [02 - 07 WRX, 04 - 07 STI] MagnumFLOW Air Filter | 31 - 10010 - JDMuscleHigh Flow Replacement Panel Filtersafe31-10010](//jdmuscleusa.com/cdn/shop/files/afe-02-07-wrx-04-07-sti-magnumflow-air-filter-31-10010-7263714.jpg?v=1770321855&width=220)
aFe MagnumFLOW Air Filter | 31-10010
Fits: 02-07 WRX, 04-07 STI
Regular price $76.00Sale price $76.00 Regular priceUnit price per$76.00 -
![Overtake Phenolic Spacers 8mm Thick [02 - 14 WRX, 04 - 21 STI, 05 - 12 LGT, 04 - 13 FXT] | A10289 - JDMusclePhenolic Thermal Intake Manifold SpacersovtovtOVRA10289](//jdmuscleusa.com/cdn/shop/files/overtake-phenolic-spacers-8mm-thick-02-14-wrx-04-21-sti-05-12-lgt-04-13-fxt-a10289-9380912.jpg?v=1770321917&width=220)
![Overtake Phenolic Spacers 8mm Thick [02 - 14 WRX, 04 - 21 STI, 05 - 12 LGT, 04 - 13 FXT] | A10289 - JDMusclePhenolic Thermal Intake Manifold SpacersovtovtOVRA10289](//jdmuscleusa.com/cdn/shop/files/overtake-phenolic-spacers-8mm-thick-02-14-wrx-04-21-sti-05-12-lgt-04-13-fxt-a10289-9810859.jpg?v=1770321917&width=220)
Overtake Phenolic Spacers 8mm Thick | A10289
Fits: 02-14 WRX, 04-21 STI, 05-12 LGT, 04-13 FXT
Regular price $59.00Sale price $59.00 Regular priceUnit price per$59.00 -
Blouch Performance 02-07 WRX/ 04-21 STI Dominator 1.5XT-R Ball Bearing Turbocharger | SUB-DOM1.5XT-R
Regular price From $1,815.00Sale price From $1,815.00 Regular priceUnit price per$0.00 -
Kartboy 02-14 WRX / 04-21 STi / 04-13 Forester EJ Alternator Cover - Carbon Fiber
Regular price $185.00Sale price $185.00 Regular priceUnit price per$185.00 -
Up to $16.11 offManley WRX STI 2.5L EJ257 99.75 Mm Bore 1.285 In. CH 18.00 CC Dish Piston | Single | 621002C-1
Regular price $185.30Sale price $185.30 Regular priceUnit price per$201.41 -
DELICIOUS TUNING 02-14 WRX / 04+ STI SET OF FOUR | 4 OEM+ COIL PACKS | YELLOW | DT_SUB1_COIL_R540
Regular price $495.00Sale price $495.00 Regular priceUnit price per$495.00 -
In StockTurbo XS 04-21 STI | EJ20/EJ25 Upper Intake Manifold Rubber Coated SS Gasket | Pair | GIM-U-EJ2025
Regular price $15.00Sale price $15.00 Regular priceUnit price per$15.00 -
In StockTurbo XS 04-21 STI | EJ20/EJ25 Lower Intake Manifold Graphite Coated Composite Gasket | Pair | GIM-L-EJ2025
Regular price $15.00Sale price $15.00 Regular priceUnit price per$15.00 -
Up to $2.99 offTorque Solution Subaru EJ Engine Rear Main Seal Tool | TS-TL-796
Regular price $47.00Sale price $47.00 Regular priceUnit price per$49.99
![aFe [02 - 07 WRX, 04 - 07 STI] MagnumFLOW Air Filters Pro 5R | 30 - 10010 - JDMuscleHigh Flow Replacement Panel Filtersafe30-10010](http://jdmuscleusa.com/cdn/shop/files/afe-02-07-wrx-04-07-sti-magnumflow-air-filters-pro-5r-30-10010-5945465.jpg?v=1770321854&width=220)
![aFe [02 - 07 WRX, 04 - 07 STI] MagnumFLOW Air Filters Pro 5R | 30 - 10010 - JDMuscleHigh Flow Replacement Panel Filtersafe30-10010](http://jdmuscleusa.com/cdn/shop/files/afe-02-07-wrx-04-07-sti-magnumflow-air-filters-pro-5r-30-10010-1292642.jpg?v=1770321854&width=220)
![Torque Solution [02-07 WRX, 04-21 STI, 04-08 FXT] Turbo Inlet Hose - Black | TS-SU-463BK](http://jdmuscleusa.com/cdn/shop/products/torque-solution-turbo-inlet-hose-black-02-07-subaru-wrx-04-19-sti-05-09-legacy-gt-04-13-ftx-turbo-inlet-hoses-and-pipes-torque-solution-tqsts-su-463bk.jpg?v=1614518827&width=220)
![HPS [02 - 07 WRX, 04 - 07 STI] Performance Cold Air Intake w/ Heatshield - Red | 827 - 606R - JDMuscleIntakesHPS827-606R](http://jdmuscleusa.com/cdn/shop/files/hps-02-07-wrx-04-07-sti-performance-cold-air-intake-w-heatshield-red-827-606r-2134333.jpg?v=1770321854&width=220)
![IAG Performance [02 - 07 WRX, 04 - 07 STI, 04 - 08 FXT] BIG MAF Intake | IAG - AFD - 1100 - JDMuscleIntakesIAG-AFD-1100](http://jdmuscleusa.com/cdn/shop/files/iag-performance-02-07-wrx-04-07-sti-04-08-fxt-big-maf-intake-iag-afd-1100-3442712.jpg?v=1770321854&width=220)
![IAG Performance [02 - 07 WRX, 04 - 07 STI, 04 - 08 FXT] BIG MAF Intake | IAG - AFD - 1100 - JDMuscleIntakesIAG-AFD-1100](http://jdmuscleusa.com/cdn/shop/files/iag-performance-02-07-wrx-04-07-sti-04-08-fxt-big-maf-intake-iag-afd-1100-2477693.jpg?v=1770321854&width=220)
![HKS [02 - 07 WRX, 04 - 07 STI, 04 - 08 FXT] Super Power Flow Intake System | 70019 - AF103 - JDMuscleIntakeshks70019-AF103](http://jdmuscleusa.com/cdn/shop/files/hks-02-07-wrx-04-07-sti-04-08-fxt-super-power-flow-intake-system-70019-af103-2671610.jpg?v=1770321854&width=220)
![HKS [02-07 WRX, 04-07 STI, 04-08 FXT] Super Power Flow Intake System | 70019-AF103](http://jdmuscleusa.com/cdn/shop/files/63d46fbdf305dcfb15494b8cc2f2d993.gif?v=1746808937&width=220)
![HPS Performance [02 - 07 WRX, 04 - 07 STI] Performance Short Ram Air Intake w/ Heat Shield - Black | 827 - 606WB - JDMuscleIntakesHPS827-606WB](http://jdmuscleusa.com/cdn/shop/files/hps-performance-02-07-wrx-04-07-sti-performance-short-ram-air-intake-w-heat-shield-black-827-606wb-8559662.jpg?v=1770329176&width=220)
![HPS Performance [02 - 07 WRX, 04 - 07 STI] Performance Short Ram Air Intake w/ Heat Shield - Black | 827 - 606WB - JDMuscleIntakesHPS827-606WB](http://jdmuscleusa.com/cdn/shop/files/hps-performance-02-07-wrx-04-07-sti-performance-short-ram-air-intake-w-heat-shield-black-827-606wb-3099378.jpg?v=1770329176&width=220)
![HKS [02 - 07 WRX, 04 - 07 STI, 04 - 08 FXT] Racing Suction Intake System | 70020 - AF101 - JDMuscleIntakesHKS70020-AF101](http://jdmuscleusa.com/cdn/shop/files/hks-02-07-wrx-04-07-sti-04-08-fxt-racing-suction-intake-system-70020-af101-1747881.jpg?v=1770321854&width=220)
![aFe [02 - 07 WRX, 04 - 07 STI] MagnumFLOW Air Filter | 31 - 10010 - JDMuscleHigh Flow Replacement Panel Filtersafe31-10010](http://jdmuscleusa.com/cdn/shop/files/afe-02-07-wrx-04-07-sti-magnumflow-air-filter-31-10010-9892314.jpg?v=1770321855&width=220)
![aFe [02 - 07 WRX, 04 - 07 STI] MagnumFLOW Air Filter | 31 - 10010 - JDMuscleHigh Flow Replacement Panel Filtersafe31-10010](http://jdmuscleusa.com/cdn/shop/files/afe-02-07-wrx-04-07-sti-magnumflow-air-filter-31-10010-7263714.jpg?v=1770321855&width=220)
![Overtake Phenolic Spacers 8mm Thick [02 - 14 WRX, 04 - 21 STI, 05 - 12 LGT, 04 - 13 FXT] | A10289 - JDMusclePhenolic Thermal Intake Manifold SpacersovtovtOVRA10289](http://jdmuscleusa.com/cdn/shop/files/overtake-phenolic-spacers-8mm-thick-02-14-wrx-04-21-sti-05-12-lgt-04-13-fxt-a10289-9380912.jpg?v=1770321917&width=220)
![Overtake Phenolic Spacers 8mm Thick [02 - 14 WRX, 04 - 21 STI, 05 - 12 LGT, 04 - 13 FXT] | A10289 - JDMusclePhenolic Thermal Intake Manifold SpacersovtovtOVRA10289](http://jdmuscleusa.com/cdn/shop/files/overtake-phenolic-spacers-8mm-thick-02-14-wrx-04-21-sti-05-12-lgt-04-13-fxt-a10289-9810859.jpg?v=1770321917&width=220)
