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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![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 Tuning Silicone Exhaust Hanger 12mm x 35mm
Fits: 08-26 WRX, 08-21 STI, 12-26 BRZ/GR86/FR-S, 05-09 Legacy GT/Outback XT, 14-18 Forester XT
Regular price $20.00Sale price $20.00 Regular priceUnit price per$20.00 -
![Tomei [06-14 WRX / 04-21 STI / 05-09 LGT] Head Gasket .7mm Pair | TOMTA4070-SB02A - JDMuscleHead GasketsTOMTA4070-SB02A](//jdmuscleusa.com/cdn/shop/products/tomei-06-14-wrx-04-21-sti-05-09-lgt-head-gasket-7mm-pair-tomta4070-sb02a-3090235.jpg?v=1781014153&width=220)
![Tomei [06-14 WRX / 04-21 STI / 05-09 LGT] Head Gasket .7mm Pair | TOMTA4070-SB02A - JDMuscleHead GasketsTOMTA4070-SB02A](//jdmuscleusa.com/cdn/shop/products/tomei-06-14-wrx-04-21-sti-05-09-lgt-head-gasket-7mm-pair-tomta4070-sb02a-3109086.jpg?v=1781014154&width=220)
Up to $12 off
In StockTomei Head Gasket .7mm Pair | TOMTA4070-SB02A
Fits: 06-14 WRX / 04-21 STI / 05-09 LGT
Only 4 leftRegular price $108.00Sale price $108.00 Regular priceUnit price per$120.00 -
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 4 leftRegular price $472.68Sale price $472.68 Regular priceUnit price per$525.20 -
![Torque Solution [02-14 WRX, 07-21 STI, 07-12 LGT, 06-13 FXT] Braided Fuel Line Kit for -6 Aeromotive FPR | TS-SU-6FLK-AM](//jdmuscleusa.com/cdn/shop/products/torque-solution-braided-fuel-line-kit-for-6-aeromotive-fpr-subaru-wrx-02-14-sti-07-19-fuel-lines-and-fittings-torque-solution-tqsts-su-6flk-am.jpg?v=1614518853&width=220)
Up to $30.55 off
In StockTorque Solution Braided Fuel Line Kit for -6 Aeromotive FPR | TS-SU-6FLK-AM
Fits: 02-14 WRX, 07-21 STI, 07-12 LGT, 06-13 FXT
Regular price $225.00Sale price $225.00 Regular priceUnit price per$255.55 -
In StockIAG Performance 02-14 WRX / 04-21 STI / 05-09 LGT / 04-13 FXT V2 Oil Pickup and Oil Control Baffle / Windage Tray Combo | IAG-ENG-2101
Only 1 leftRegular price $329.99Sale price $329.99 Regular priceUnit price per$329.99 -
IAG Performance Replacement Blow Off Valve Elbow Black
Fits: 02-07 WRX, 04-21 STI
Regular price $59.99Sale price $59.99 Regular priceUnit price per$59.99 -
Up to $9.15 off
In StockPerrin Alternator Pulley - Red
Fits: 06-14 WRX, 07-21 STI, 12-16 Impreza, 06-13 FXT, 05-09 Legacy
Only 1 leftRegular price $51.85Sale price $51.85 Regular priceUnit price per$61.00 -
![IAG Performance [02 - 14 WRX, 04 - 21 STI, 05 - 12 LGT, 04 - 13 FXT] 8mm Thick Phenolic Spacers | IAG - AFD - 3104 - JDMusclePhenolic Thermal Intake Manifold SpacersIAG-AFD-3104](//jdmuscleusa.com/cdn/shop/files/iag-performance-02-14-wrx-04-21-sti-05-12-lgt-04-13-fxt-8mm-thick-phenolic-spacers-iag-afd-3104-4678295.jpg?v=1770327978&width=220)
In StockIAG 8mm Thick Phenolic Spacers
Fits: 02-14 WRX, 04-21 STI, 05-12 LGT, 04-13 FXT
Only 1 leftRegular price $74.99Sale price $74.99 Regular priceUnit price per$74.99 -
In StockIAG 04-21 STI Big Bore 76mm Throttle Body w/ Electronics & Adapter Intake Manifolds | IAG-AFD-2027SL
Only 1 leftRegular price $414.99Sale price $414.99 Regular priceUnit price per$414.99 -
In StockIAG Subaru STI Big Bore 76mm Throttle Body w/ Electronics & Adapter Package Process West Intake Manifolds
Only 1 leftRegular price $414.99Sale price $414.99 Regular priceUnit price per$414.99 -
In StockIAG 02-14 WRX, 04-21 STI, 05-09 LGT, 04-13 FXT 550 Street Cylinder Heads Package | IAG-ENG-H550NE
Only 1 leftRegular price $3,399.99Sale price $3,399.99 Regular priceUnit price per$3,399.99 -
In StockIAG 02-14 WRX / 04-21 STI / 05-12 LGT / 05-09 Outback XT / 04-13 FXT Stage 2 CNC Ported 11mm Oil Pump | IAG-ENG-2240
Only 1 leftRegular price $479.99Sale price $479.99 Regular priceUnit price per$479.99 -
![Tomei [02-07 WRX, 04-21 STI, 04-08 FXT] Silicone Turbo Inlet Hose - Blue | TB301A-SB01A](//jdmuscleusa.com/cdn/shop/files/tomei-silicone-turbo-inlet-hose-blue-2002-2007-wrx-2004-2021-sti-2004-2008-fxt-tb301a-sb01a-237363_556x417_34b0da4a-8a6c-4abb-b20e-88640a1ae4a0.jpg?v=1690926590&width=220)
Up to $19 off
In StockTomei Silicone Turbo Inlet Hose - Blue | TB301A-SB01A
Fits: 02-07 WRX, 04-21 STI, 04-08 FXT
Only 5 leftRegular price $171.00Sale price $171.00 Regular priceUnit price per$190.00 -
Up to $6.05 off
In StockMishimoto Racing Thermostat | MMTS-WRX-01
Fits: 02-14 WRX, 04-21 STI, 05-09 LGT, 04-05 FXT, 09 FXT
Regular price $64.95Sale price $64.95 Regular priceUnit price per$71.00 -
Up to $70.57 off
In StockGSC Power-Division Single Beehive Valve Spring Set w/ Titanium Retainers Subaru Models | inc. 2002-2014 WRX / 2004+ STI
Only 17 leftRegular price $399.92Sale price $399.92 Regular priceUnit price per$470.49 -
In StockIAG Performance 02-14 WRX / 04-21 STI / 05-09 LGT / 04-13 FXT Oil Control Baffle / Windage Tray Combo | IAG-ENG-2087
Only 2 leftRegular price From $199.99Sale price From $199.99 Regular priceUnit price per$199.99
![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)
![Tomei [06-14 WRX / 04-21 STI / 05-09 LGT] Head Gasket .7mm Pair | TOMTA4070-SB02A - JDMuscleHead GasketsTOMTA4070-SB02A](http://jdmuscleusa.com/cdn/shop/products/tomei-06-14-wrx-04-21-sti-05-09-lgt-head-gasket-7mm-pair-tomta4070-sb02a-3090235.jpg?v=1781014153&width=220)
![Tomei [06-14 WRX / 04-21 STI / 05-09 LGT] Head Gasket .7mm Pair | TOMTA4070-SB02A - JDMuscleHead GasketsTOMTA4070-SB02A](http://jdmuscleusa.com/cdn/shop/products/tomei-06-14-wrx-04-21-sti-05-09-lgt-head-gasket-7mm-pair-tomta4070-sb02a-3109086.jpg?v=1781014154&width=220)
![Torque Solution [02-14 WRX, 07-21 STI, 07-12 LGT, 06-13 FXT] Braided Fuel Line Kit for -6 Aeromotive FPR | TS-SU-6FLK-AM](http://jdmuscleusa.com/cdn/shop/products/torque-solution-braided-fuel-line-kit-for-6-aeromotive-fpr-subaru-wrx-02-14-sti-07-19-fuel-lines-and-fittings-torque-solution-tqsts-su-6flk-am.jpg?v=1614518853&width=220)
![IAG Performance [02 - 14 WRX, 04 - 21 STI, 05 - 12 LGT, 04 - 13 FXT] 8mm Thick Phenolic Spacers | IAG - AFD - 3104 - JDMusclePhenolic Thermal Intake Manifold SpacersIAG-AFD-3104](http://jdmuscleusa.com/cdn/shop/files/iag-performance-02-14-wrx-04-21-sti-05-12-lgt-04-13-fxt-8mm-thick-phenolic-spacers-iag-afd-3104-4678295.jpg?v=1770327978&width=220)
![Tomei [02-07 WRX, 04-21 STI, 04-08 FXT] Silicone Turbo Inlet Hose - Blue | TB301A-SB01A](http://jdmuscleusa.com/cdn/shop/files/tomei-silicone-turbo-inlet-hose-blue-2002-2007-wrx-2004-2021-sti-2004-2008-fxt-tb301a-sb01a-237363_556x417_34b0da4a-8a6c-4abb-b20e-88640a1ae4a0.jpg?v=1690926590&width=220)
