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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![Torque Solution [02-25 WRX, 04-21 STI] V3 Billet Pitch Stop Engine Mount | TS-SU-011](//jdmuscleusa.com/cdn/shop/products/torque-solution-v3-billet-pitch-stop-engine-mount-subaru-wrx-2002-2014-sti-2004-2019-engine-mounts-torque-solution-black-tqsts-su-011.jpg?v=1614518869&width=220)
![Torque Solution [02-25 WRX, 04-21 STI] V3 Billet Pitch Stop Engine Mount | TS-SU-011](//jdmuscleusa.com/cdn/shop/products/torque-solution-v3-billet-pitch-stop-engine-mount-subaru-wrx-2002-2014-sti-2004-2019-engine-mounts-torque-solution-2.jpg?v=1614676005&width=220)
Up to $24.10 off
In StockTorque Solution V3 Billet Pitch Stop Engine Mount | TS-SU-011
Fits: 02-26 WRX, 04-21 STI
Regular price From $87.00Sale price From $87.00 Regular priceUnit price per$111.10 -
Up to $74.98 off
In StockTurbo XS 02-07 WRX / 04-21 STI RFL Series Hybrid Blow Off Valve | TXS-WS-HYB
Only 3 leftRegular price $250.00Sale price $250.00 Regular priceUnit price per$324.98 -
In StockWalbro 450lph In-Tank Fuel Pump High Pressure Version | F90000274 - Universal
Regular price From $144.50Sale price From $144.50 Regular priceUnit price per$0.00 -
GrimmSpeed Lower Uppipe Gasket | 026001
Regular price $29.00Sale price $29.00 Regular priceUnit price per$29.00 -
![Perrin [02-07 WRX, 04-07 STI, 04-08 FXT] Short Ram Intake V2 | PSP-INT-201](//jdmuscleusa.com/cdn/shop/products/perrin-short-ram-intake-v2-subaru-wrx-sti-2002-2007-psp-int-201bk-short-ram-intakes-perrin-performance-black-papsp-int-201bk.jpg?v=1737769412&width=220)
Up to $82.25 off
In StockPerrin Short Ram Intake V2
Fits: 02-07 WRX, 04-07 STI, 04-08 FXT
Only 17 leftRegular price $246.75Sale price $246.75 Regular priceUnit price per$329.00 -
Up to $277.75 off
In StockPerrin Front Mount Intercooler Core
Fits: 02-07 WRX/STI
Only 1 leftRegular price $833.25Sale price $833.25 Regular priceUnit price per$1,111.00 -
Grimmspeed 02-07 WRX / 04-21 STI / 04-08 FXT Top Mount Intercooler Y-Pipe Kit Black | 090096
Regular price $245.00Sale price $245.00 Regular priceUnit price per$245.00 -
Up to $15 off
In StockAEM Fuel Pump 340lph - Universal
Regular price $117.95Sale price $117.95 Regular priceUnit price per$132.95 -
Subaru USDM Thermostat Gasket | 21236aa010
Fits: 02-14 WRX, 04-21 STI
Regular price $3.75Sale price $3.75 Regular priceUnit price per$3.75 -
Up to $21.05 off
In StockMishimoto Ignition Coil Set - 4-Pack for Improved Engine Performance
Fits: 04-10 WRX/STI
Only 3 leftRegular price $205.95Sale price $205.95 Regular priceUnit price per$227.00 -
Up to $16.26 off
In StockTurbo XS Radiator Stay No Hood Prop - Black
Fits: 02-07 WRX, 04-07 STI
Only 5 leftRegular price $49.00Sale price $49.00 Regular priceUnit price per$65.26 -
In StockTR Twin Scroll High Flow Catless Downpipe *FOR TWIN SCROLL TURBO USE ONLY*
Fits: 02-07 WRX, 04-07 STI
Regular price $720.00Sale price $720.00 Regular priceUnit price per$720.00 -
In StockOVERTAKE TMIC Silicone Coupler Kit - 2004-2021 STI, 2002-2007 WRX, 2004-2008 Forester XT w/ STI Style TMIC
Regular price $88.00Sale price $88.00 Regular priceUnit price per$88.00 -
![Cobb [Subaru] Silicone Exhaust Hanger 12mm x 35mm - JDMuscleExhaust HangerscobbUNI-001-272](//jdmuscleusa.com/cdn/shop/files/cobb-subaru-silicone-exhaust-hanger-12mm-x-35mm-3590037.jpg?v=1770322211&width=220)
In StockCobb Silicone Exhaust Hanger 12mm x 35mm
Fits: Subaru
Regular price $20.00Sale price $20.00 Regular priceUnit price per$20.00 -
Up to $70 offPerrin Red Air Oil Separator | PSP-ENG-605RD
Fits: 02-07 WRX/STI w/ TMIC
Regular price $502.00Sale price $502.00 Regular priceUnit price per$572.00 -
Up to $52.52 off
In StockGo Fast Bits Deceptor Pro II Electronically Adjustable Blow Off Valve | T9503
Fits: 02-07 WRX, 04-21 STI, 06-08 FXT
Only 5 leftRegular price $472.68Sale price $472.68 Regular priceUnit price per$525.20
![Torque Solution [02-25 WRX, 04-21 STI] V3 Billet Pitch Stop Engine Mount | TS-SU-011](http://jdmuscleusa.com/cdn/shop/products/torque-solution-v3-billet-pitch-stop-engine-mount-subaru-wrx-2002-2014-sti-2004-2019-engine-mounts-torque-solution-black-tqsts-su-011.jpg?v=1614518869&width=220)
![Torque Solution [02-25 WRX, 04-21 STI] V3 Billet Pitch Stop Engine Mount | TS-SU-011](http://jdmuscleusa.com/cdn/shop/products/torque-solution-v3-billet-pitch-stop-engine-mount-subaru-wrx-2002-2014-sti-2004-2019-engine-mounts-torque-solution-2.jpg?v=1614676005&width=220)
![Perrin [02-07 WRX, 04-07 STI, 04-08 FXT] Short Ram Intake V2 | PSP-INT-201](http://jdmuscleusa.com/cdn/shop/products/perrin-short-ram-intake-v2-subaru-wrx-sti-2002-2007-psp-int-201bk-short-ram-intakes-perrin-performance-black-papsp-int-201bk.jpg?v=1737769412&width=220)
![Cobb [Subaru] Silicone Exhaust Hanger 12mm x 35mm - JDMuscleExhaust HangerscobbUNI-001-272](http://jdmuscleusa.com/cdn/shop/files/cobb-subaru-silicone-exhaust-hanger-12mm-x-35mm-3590037.jpg?v=1770322211&width=220)
