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 StockKartboy Battery Tie Down | KB-100-BT
Fits: Most Subaru Models
Regular price $45.00Sale price $45.00 Regular priceUnit price per$45.00 -
In StockGates 04-14 WRX/ 04-21 STI/ 05-09 LGT Timing Belt Kit | TCK328
Only 15 leftRegular price $358.00Sale price $358.00 Regular priceUnit price per$358.00 -
In StockTorque Solution T-Bolt Hose Clamp - Universal
Only 11 leftRegular price From $12.00Sale price From $12.00 Regular priceUnit price per$12.00 -
In StockWalbro 255LPH Fuel Pump Only - Universal
Regular price $76.00Sale price $76.00 Regular priceUnit price per$76.00 -
In StockGrimmSpeed 06-07 WRX / 04-21 STI Drive-by-Wire Throttle Body Gasket | 020010
Only 1 leftRegular price $24.00Sale price $24.00 Regular priceUnit price per$24.00 -
In StockInjector Dymanics Fuel Injector PnP Adapter USCAR to Denso - Universal
Regular price $17.33Sale price $17.33 Regular priceUnit price per$17.33 -
In StockGrimmspeed 02-07 WRX / 04-21 STI / 04-08 FXT Top Mount Intercooler Y-Pipe Kit Red | 090095
Only 1 leftRegular price $245.00Sale price $245.00 Regular priceUnit price per$245.00 -
Subaru USDM Thermostat Gasket
Fits: 02-14 WRX, 04-21 STI
Regular price $8.00Sale price $8.00 Regular priceUnit price per$8.00 -
Up to $1.80 off
In StockBLOX Racing Magnetic Oil Drain Plug - M20x1.50mm
Only 2 leftRegular price $16.20Sale price $16.20 Regular priceUnit price per$18.00 -
![COBB [02 - 07 WRX, 04 - 21 STI, 06 - 08 FXT] LF Bypass Valve | 712665 - JDMuscleBlow Off Valvescobb712665](//jdmuscleusa.com/cdn/shop/products/cobb-02-07-wrx-04-21-sti-06-08-fxt-lf-bypass-valve-712665-7110805.jpg?v=1770336431&width=220)
![COBB [02 - 07 WRX, 04 - 21 STI, 06 - 08 FXT] LF Bypass Valve | 712665 - JDMuscleBlow Off Valvescobb712665](//jdmuscleusa.com/cdn/shop/products/cobb-02-07-wrx-04-21-sti-06-08-fxt-lf-bypass-valve-712665-1547680.jpg?v=1770336431&width=220)
In StockCobb Tuning LF Bypass Valve
Fits: 02-07 WRX, 04-21 STI, 06-08 FXT
Regular price $375.00Sale price $375.00 Regular priceUnit price per$375.00 -
Up to $22.90 off
In StockTurbosmart Kompact Plumb Back BPV
Fits: 02-07 WRX, 04-21 STI, 04-08 FXT
Only 10 leftRegular price $206.09Sale price $206.09 Regular priceUnit price per$228.99 -
In StockInjector Dynamics 02-14 WRX / 07-19 STI Top Feed ID1050X Power Package 1
Regular price From $643.00Sale price From $643.00 Regular priceUnit price per$643.00 -
Process West Silicone Y-Pipe
Fits: 02-07 WRX, 04-14 STI
Regular price $93.30Sale price $93.30 Regular priceUnit price per$93.30 -
![Perrin [06 - 14 WRX, 07 - 21 STI, 12 - 16 Impreza, 06 - 13 FXT, 05 - 09 Legacy] Alternator Pulley Black | PSP - ENG - 119BK - JDMusclePulleysperPSP-ENG-119BK](//jdmuscleusa.com/cdn/shop/files/perrin-06-14-wrx-07-21-sti-12-16-impreza-06-13-fxt-05-09-legacy-alternator-pulley-black-psp-eng-119bk-8778143.jpg?v=1770327968&width=220)
Up to $9.15 off
In StockPerrin Alternator Pulley - Black
Fits: 06-14 WRX, 07-21 STI, 12-16 Impreza, 06-13 FXT, 05-09 Legacy
Only 6 leftRegular price $51.85Sale price $51.85 Regular priceUnit price per$61.00 -
![Radium Engineering [02 - 14 WRX/STI] Top Feed Fuel Rails Black | 20 - 0567 - 02 - JDMuscleFuel Railsrad20-0567-02](//jdmuscleusa.com/cdn/shop/files/radium-engineering-02-14-wrxsti-top-feed-fuel-rails-black-20-0567-02-7682151.jpg?v=1770327979&width=220)
![Radium Engineering [02 - 14 WRX/STI] Top Feed Fuel Rails Black | 20 - 0567 - 02 - JDMuscleFuel Railsrad20-0567-02](//jdmuscleusa.com/cdn/shop/files/radium-engineering-02-14-wrxsti-top-feed-fuel-rails-black-20-0567-02-8318867.jpg?v=1770327980&width=220)
In StockRadium Engineering Top Feed Fuel Rails Black
Fits: 02-14 WRX/STI
Regular price $199.45Sale price $199.45 Regular priceUnit price per$199.45 -
In StockGrimmspeed Top Mount Intercooler - Raw
Fits: 04-21 STI, 02-07 WRX, 04-08 FXT
Only 1 leftRegular price $999.00Sale price $999.00 Regular priceUnit price per$999.00
![COBB [02 - 07 WRX, 04 - 21 STI, 06 - 08 FXT] LF Bypass Valve | 712665 - JDMuscleBlow Off Valvescobb712665](http://jdmuscleusa.com/cdn/shop/products/cobb-02-07-wrx-04-21-sti-06-08-fxt-lf-bypass-valve-712665-7110805.jpg?v=1770336431&width=220)
![COBB [02 - 07 WRX, 04 - 21 STI, 06 - 08 FXT] LF Bypass Valve | 712665 - JDMuscleBlow Off Valvescobb712665](http://jdmuscleusa.com/cdn/shop/products/cobb-02-07-wrx-04-21-sti-06-08-fxt-lf-bypass-valve-712665-1547680.jpg?v=1770336431&width=220)
![Perrin [06 - 14 WRX, 07 - 21 STI, 12 - 16 Impreza, 06 - 13 FXT, 05 - 09 Legacy] Alternator Pulley Black | PSP - ENG - 119BK - JDMusclePulleysperPSP-ENG-119BK](http://jdmuscleusa.com/cdn/shop/files/perrin-06-14-wrx-07-21-sti-12-16-impreza-06-13-fxt-05-09-legacy-alternator-pulley-black-psp-eng-119bk-8778143.jpg?v=1770327968&width=220)
![Radium Engineering [02 - 14 WRX/STI] Top Feed Fuel Rails Black | 20 - 0567 - 02 - JDMuscleFuel Railsrad20-0567-02](http://jdmuscleusa.com/cdn/shop/files/radium-engineering-02-14-wrxsti-top-feed-fuel-rails-black-20-0567-02-7682151.jpg?v=1770327979&width=220)
![Radium Engineering [02 - 14 WRX/STI] Top Feed Fuel Rails Black | 20 - 0567 - 02 - JDMuscleFuel Railsrad20-0567-02](http://jdmuscleusa.com/cdn/shop/files/radium-engineering-02-14-wrxsti-top-feed-fuel-rails-black-20-0567-02-8318867.jpg?v=1770327980&width=220)
