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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Up to $34.05 off
In StockMishimoto Aluminum Radiator 25in x 16in x 3in - Universal
Only 5 leftRegular price $339.95Sale price $339.95 Regular priceUnit price per$374.00 -
Up to $1.30 off
In StockCusco Exhaust Hanger 15mm
Fits: 02-07 WRX/STI
Only 19 leftRegular price $11.70Sale price $11.70 Regular priceUnit price per$13.00 -
Up to $17.50 off
In StockCusco Oil Catch Can .3L Capacity WRX/STI 2002-2007
Only 8 leftRegular price $157.50Sale price $157.50 Regular priceUnit price per$175.00 -
Up to $18 off
In StockAEM Boost Control Solenoid - Universal | 30-2400
Only 15 leftRegular price $143.95Sale price $143.95 Regular priceUnit price per$161.95 -
Up to $91 off
In StockAEM V2 5 Gallon Water/Methanol Injection Kit | Internal Map - Universal | 30-3301
Only 7 leftRegular price $727.95Sale price $727.95 Regular priceUnit price per$818.95 -
Up to $44 off
In StockAEM Ethanol Content Flex Fuel Sensor w/ -6AN fittings Kit - Universal | 30-2201
Only 5 leftRegular price $349.95Sale price $349.95 Regular priceUnit price per$393.95 -
![OVERTAKE [04-21 STI, 06-07 WRX] Drive-By-Wire Throttle Body Gasket](//jdmuscleusa.com/cdn/shop/files/a10479-overtake-drive-by-wire-throttle-body-gasket-1.jpg?v=1784218225&width=220)
![OVERTAKE [04-21 STI, 06-07 WRX] Drive-By-Wire Throttle Body Gasket](//jdmuscleusa.com/cdn/shop/files/a10479-overtake-drive-by-wire-throttle-body-gasket-2.jpg?v=1784218226&width=220)
In StockOVERTAKE Drive-By-Wire Throttle Body Gasket
Fits: 04-21 STI, 06-07 WRX
Regular price $9.00Sale price $9.00 Regular priceUnit price per$9.00 -
![OVERTAKE [02-14 WRX, 04-21 STI, 04-13 FXT, 05-09 OBXT/LGT] Turbo Heatshield Reflective Gold Foil](//jdmuscleusa.com/cdn/shop/files/A10927-overtake-turbo-heatshield-foil-2.jpg?v=1784218225&width=220)
![OVERTAKE [02-14 WRX, 04-21 STI, 04-13 FXT, 05-09 OBXT/LGT] Turbo Heatshield Reflective Gold Foil](//jdmuscleusa.com/cdn/shop/files/A10927-overtake-turbo-heatshield-foil-1.jpg?v=1784218225&width=220)
In StockOVERTAKE Turbo Heatshield Reflective Gold Foil
Fits: 02-14 WRX, 04-21 STI, 04-13 FXT, 05-09 OBXT/LGT
Regular price $45.00Sale price $45.00 Regular priceUnit price per -
GrimmSpeed Subaru EJ Engine Timing Belt Guide
Regular price $11,471.00Sale price $11,471.00 Regular priceUnit price per -
JE Pistons Pro Seal 100mm 0.051in Headgasket
Fits: WRX/STI EJ25/EJ257
Regular price $101.73Sale price $101.73 Regular priceUnit price per$101.73 -
Up to $6.94 off
In StockManley Performance Valve Spring Set
Fits: 04-07 WRX/STI
Only 9 leftRegular price $131.89Sale price $131.89 Regular priceUnit price per$138.83 -
Up to $134.20 off
In StockKoyo Aluminum Radiator
Fits: 02-07 WRX/STI M/T
Only 20 leftRegular price $404.00Sale price $404.00 Regular priceUnit price per$538.20 -
![TurboXS [02-07 WRX/STI] Catback Exhaust Polished Tips - JDMuscleExhaust Tips and SilencersTXSWS02-CBE](//jdmuscleusa.com/cdn/shop/files/turboxs-02-07-wrxsti-catback-exhaust-polished-tips-5151252.jpg?v=1781003232&width=220)
![TurboXS [02-07 WRX/STI] Catback Exhaust Polished Tips - JDMuscleExhaust Tips and SilencersTXSWS02-CBE](//jdmuscleusa.com/cdn/shop/files/turboxs-02-07-wrxsti-catback-exhaust-polished-tips-8750034.jpg?v=1781003233&width=220)
Up to $122.16 offTurboXS Catback Exhaust Polished Tips
Fits: 02-07 WRX/STI
Regular price $711.00Sale price $711.00 Regular priceUnit price per$833.16 -
Up to $6 off
In StockOVERTAKE Catback Exhaust Refresh Kit - 3in. Single Exit
Fits: 02-26 WRX, 04-21 STI, 13-26 BRZ, 13-26 GR86
Only 18 leftRegular price $49.00Sale price $49.00 Regular priceUnit price per$55.00 -
In StockFactionFab V2 FR-Spec Coilovers
Fits: 08-14 WRX
Only 6 leftRegular price $1,350.00Sale price $1,350.00 Regular priceUnit price per$1,350.00 -
FactionFab FR-Spec Coilover Replacement Rear Strut. To be used with FFA1.10176.2/FFA1.10177.2
Fits: 08-14 STI, 15-21 WRX/STI
Regular price $150.00Sale price $150.00 Regular priceUnit price per$150.00
![OVERTAKE [04-21 STI, 06-07 WRX] Drive-By-Wire Throttle Body Gasket](http://jdmuscleusa.com/cdn/shop/files/a10479-overtake-drive-by-wire-throttle-body-gasket-1.jpg?v=1784218225&width=220)
![OVERTAKE [04-21 STI, 06-07 WRX] Drive-By-Wire Throttle Body Gasket](http://jdmuscleusa.com/cdn/shop/files/a10479-overtake-drive-by-wire-throttle-body-gasket-2.jpg?v=1784218226&width=220)
![OVERTAKE [02-14 WRX, 04-21 STI, 04-13 FXT, 05-09 OBXT/LGT] Turbo Heatshield Reflective Gold Foil](http://jdmuscleusa.com/cdn/shop/files/A10927-overtake-turbo-heatshield-foil-2.jpg?v=1784218225&width=220)
![OVERTAKE [02-14 WRX, 04-21 STI, 04-13 FXT, 05-09 OBXT/LGT] Turbo Heatshield Reflective Gold Foil](http://jdmuscleusa.com/cdn/shop/files/A10927-overtake-turbo-heatshield-foil-1.jpg?v=1784218225&width=220)
![TurboXS [02-07 WRX/STI] Catback Exhaust Polished Tips - JDMuscleExhaust Tips and SilencersTXSWS02-CBE](http://jdmuscleusa.com/cdn/shop/files/turboxs-02-07-wrxsti-catback-exhaust-polished-tips-5151252.jpg?v=1781003232&width=220)
![TurboXS [02-07 WRX/STI] Catback Exhaust Polished Tips - JDMuscleExhaust Tips and SilencersTXSWS02-CBE](http://jdmuscleusa.com/cdn/shop/files/turboxs-02-07-wrxsti-catback-exhaust-polished-tips-8750034.jpg?v=1781003233&width=220)
