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
-
Up to $4.88 off
In StockTorque Solution VF Turbo Wastegate Bracket
Fits: 08-14 WRX, 04-21 STI
Only 3 leftRegular price $44.00Sale price $44.00 Regular priceUnit price per$48.88 -
Torque Solution Billet Aluminum 1.25in Bypass Plug WRX/STI / EVO - Universal
Regular price $18.00Sale price $18.00 Regular priceUnit price per$18.00 -
Up to $4.99 off
In StockTorque Solution Spark Plug Gap Tool w/ Feeler Gauge 14mm - Universal
Only 2 leftRegular price $42.00Sale price $42.00 Regular priceUnit price per$46.99 -
In StockTurbo XS T Clamp Stainless Steel 74-80mm/2.91-3.14in - Universal
Regular price $15.00Sale price $15.00 Regular priceUnit price per$15.00 -
In StockWalbro 255LPH Fuel Pump Only - Universal
Regular price $76.00Sale price $76.00 Regular priceUnit price per$76.00 -
Injector Dynamics Denso USCAR PnP Injector Adapter - Universal
Regular price $17.33Sale price $17.33 Regular priceUnit price per$17.33 -
Up to $520 off
In StockInvidia Q300 Cat Back Exhaust | HS02SW1G3S
Fits: 02-07 WRX, 04-07 STI
Only 10 leftRegular price $1,146.00Sale price $1,146.00 Regular priceUnit price per$1,666.00 -
Up to $114.40 offPerrin Black Air Oil Separator Subaru 2008-2014 WRX / 2002-2020 STI with Top Mount Intercooler | PSP-ENG-606BK
Regular price $457.60Sale price $457.60 Regular priceUnit price per$572.00 -
Up to $3.57 off
In StockMishimoto Transition Coupler 2.5-in to 3-in - Universal
Only 15 leftRegular price From $11.95Sale price From $11.95 Regular priceUnit price per$13.00 -
Up to $2.23 off
In StockMishimoto Transition Coupler 2-in to 2.5-in - Universal
Only 11 leftRegular price From $9.95Sale price From $9.95 Regular priceUnit price per$12.05 -
Forced Performance Blue HTZ Turbocharger - Subaru Models | inc. 2002-2007 WRX / 2004+ STI | 2025050
Regular price $7,120.00Sale price $7,120.00 Regular priceUnit price per$7,120.00 -
![GrimmSpeed [02-07 WRX, 04-07 STI, 04-08 FXT] Post MAF Hose Kit - Black | 125009](//jdmuscleusa.com/cdn/shop/products/GrimmSpeed_PostMAFHose_16_1200px__54599.1607375122.jpg?v=1746807638&width=220)
![GrimmSpeed [02-07 WRX, 04-07 STI, 04-08 FXT] Post MAF Hose Kit - Black | 125009](//jdmuscleusa.com/cdn/shop/products/GrimmSpeed_PostMAFHose_18_1200px__85125.1607375123.jpg?v=1746807638&width=220)
GrimmSpeed Post MAF Hose Kit - Black | 125009
Fits: 02-07 WRX, 04-07 STI, 04-08 FXT
Regular price $121.00Sale price $121.00 Regular priceUnit price per$121.00 -
GrimmSpeed MAF Block Off - WRX/STI / Forester XT 2002-21
Regular price From $62.00Sale price From $62.00 Regular priceUnit price per$62.00 -
Grimmspeed 3-Port Electronic Boost Control Solenoid - SUBARU 06-07 WRX, 04-07 STI, 04-08 FXT | 057002
Regular price $190.00Sale price $190.00 Regular priceUnit price per$190.00 -
GrimmSpeed Top Mount Intercooler Thermal - Black
Fits: 02-07 WRX, 04-21 STI, 04-08 FXT
Regular price $1,065.00Sale price $1,065.00 Regular priceUnit price per$1,065.00 -
Up to $3.40 off
In StockCusco High Pressure Radiator Cap - Universal
Only 11 leftRegular price $30.60Sale price $30.60 Regular priceUnit price per$34.00
![GrimmSpeed [02-07 WRX, 04-07 STI, 04-08 FXT] Post MAF Hose Kit - Black | 125009](http://jdmuscleusa.com/cdn/shop/products/GrimmSpeed_PostMAFHose_16_1200px__54599.1607375122.jpg?v=1746807638&width=220)
![GrimmSpeed [02-07 WRX, 04-07 STI, 04-08 FXT] Post MAF Hose Kit - Black | 125009](http://jdmuscleusa.com/cdn/shop/products/GrimmSpeed_PostMAFHose_18_1200px__85125.1607375123.jpg?v=1746807638&width=220)
