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 [02 - 14 WRX, 07 - 21 STI, 07 - 12 Legacy GT, 06 - 13 Forester XT] Top Feed 1050X Fuel Injectors | 312150 - JDMuscleFuel Injectors and Accessoriescobb312150](//jdmuscleusa.com/cdn/shop/products/cobb-02-14-wrx-07-21-sti-07-12-legacy-gt-06-13-forester-xt-top-feed-1050x-fuel-injectors-312150-5750979.jpg?v=1770336558&width=220)
![COBB [02 - 14 WRX, 07 - 21 STI, 07 - 12 Legacy GT, 06 - 13 Forester XT] Top Feed 1050X Fuel Injectors | 312150 - JDMuscleFuel Injectors and Accessoriescobb312150](//jdmuscleusa.com/cdn/shop/products/cobb-02-14-wrx-07-21-sti-07-12-legacy-gt-06-13-forester-xt-top-feed-1050x-fuel-injectors-312150-9693839.jpg?v=1770336559&width=220)
In StockCOBB Top Feed 1050X Fuel Injectors
Fits: 02-14 WRX, 07-21 STI, 07-12 Legacy GT, 06-13 Forester XT
Regular price $625.00Sale price $625.00 Regular priceUnit price per$625.00 -
Up to $156 off
In StockPLM Power Driven Subaru EWG 3-Bolt Up Pipe & Dump Tube 38mm WRX 2002-2014 / STI 2004-2020 / Baja Turbo 2004-2006 / Forester XT 2004-2013 / Legacy GT 2005-2009 / Outback XT 2005-2009 | PLM-SUB-UP-PIPE-EWG-38MM-3B
Only 8 leftRegular price $339.00Sale price $339.00 Regular priceUnit price per$495.00 -
Process West 06-21 STI Intake Manifold Street Version Black | PWIM002B
Regular price $2,333.00Sale price $2,333.00 Regular priceUnit price per$2,333.00 -
In StockGates Micro-V Belt Alternator & Power Steering Belt
Fits: 02-14 WRX, 04-21 STI
Only 7 leftRegular price $29.00Sale price $29.00 Regular priceUnit price per$29.00 -
![Seibon Carbon Fiber Hood/Trunk Prop w/ Seibon Logo [Universal] | HOODPROP-S](//jdmuscleusa.com/cdn/shop/products/seibon-carbon-fiber-hoodtrunk-prop-w-seibon-logo-universal-hoodprop-s-hood-dampers-seibon-seihoodprop-s.jpg?v=1614519856&width=220)
![Seibon Carbon Fiber Hood/Trunk Prop w/ Seibon Logo [Universal] | HOODPROP-S](//jdmuscleusa.com/cdn/shop/files/Siebon_Authorized_Dealer_963508de-6254-4ebb-b06f-da40665ca67a.png?v=1738252169&width=220)
Up to $13 off
In StockSeibon Carbon Fiber Hood/Trunk Prop w/ Seibon Logo
Fits: Universal
Regular price $117.00Sale price $117.00 Regular priceUnit price per$130.00 -
In StockWalbro 450lph E85 Compatiable Fuel Pump & Installation Kit | TIA485-2 - Universal
Regular price $206.00Sale price $206.00 Regular priceUnit price per$206.00 -
![GrimmSpeed [02-07 WRX / 04-21 STI] Air/Oil Separator | 078006](//jdmuscleusa.com/cdn/shop/products/grimmspeed-air-oil-separator-subaru-sti-2004-2020-078006-air-oil-separators-grimmspeed-red-078006r-2.jpg?v=1614675538&width=220)
![GrimmSpeed [02-07 WRX / 04-21 STI] Air/Oil Separator | 078006](//jdmuscleusa.com/cdn/shop/products/grimmspeed-air-oil-separator-subaru-sti-2004-2020-078006-air-oil-separators-grimmspeed-3.jpg?v=1614658553&width=220)
GrimmSpeed Air/Oil Separator | 078006
Fits: 02-07 WRX / 04-21 STI
Regular price $426.00Sale price $426.00 Regular priceUnit price per$426.00 -
Up to $2.70 off
In StockCusco Oil Drain Plug M20x1.5 - Universal
Regular price $24.30Sale price $24.30 Regular priceUnit price per$27.00 -
![Turbo XS [02 - 07 STI] Midpipe for Version 2 Catback Exhaust Systems | WS1 - MP - JDMuscleExhaust Mid PipestxsWS1-MP](//jdmuscleusa.com/cdn/shop/products/turbo-xs-02-07-sti-midpipe-for-version-2-catback-exhaust-systems-ws1-mp-5742227.jpg?v=1770328393&width=220)
Up to $92.62 off
In StockTurbo XS Midpipe for Version 2 Catback Exhaust Systems | WS1-MP
Fits: 02-07 STI
Regular price $245.00Sale price $245.00 Regular priceUnit price per$337.62 -
Grimmspeed 04-21 STI / 02-07 WRX V2 Bypass Valve Black | 126032BLK
Regular price $352.00Sale price $352.00 Regular priceUnit price per$352.00 -
In StockHKS 06-14 WRX / 04-21 STI Stainless Steel Equal Length Exhaust Manifold | 14019-AF002
Regular price $809.00Sale price $809.00 Regular priceUnit price per$809.00 -
Killer B Motorsport 02-14 WRX / 04-21 STI OG Style Oil Pickup | 070-110
Regular price $149.00Sale price $149.00 Regular priceUnit price per$149.00 -
![Perrin [02 - 14 WRX, 04 - 21 STI] Belt Cover Hyper Pink | PSP - ENG - 150HP - JDMuscleBelt CoversperPSP-ENG-150HP](//jdmuscleusa.com/cdn/shop/products/perrin-02-14-wrx-04-21-sti-belt-cover-hyper-pink-psp-eng-150hp-4918766.jpg?v=1770330553&width=220)
![Perrin [02 - 14 WRX, 04 - 21 STI] Belt Cover Hyper Pink | PSP - ENG - 150HP - JDMuscleBelt CoversperPSP-ENG-150HP](//jdmuscleusa.com/cdn/shop/products/perrin-02-14-wrx-04-21-sti-belt-cover-hyper-pink-psp-eng-150hp-8528183.jpg?v=1770330553&width=220)
Up to $29.25 off
In StockPerrin Belt Cover Hyper Pink
Fits: 02-14 WRX, 04-21 STI
Only 8 leftRegular price $87.75Sale price $87.75 Regular priceUnit price per$117.00 -
![IAG [02 - 14 WRX, 04 - 21 STI, 05 - 09 LGT, 04 - 13 FXT] Street Series Oil Pan Package | IAG - ENG - 2201 - JDMuscleOil PansIAG-ENG-2201SLSilver](//jdmuscleusa.com/cdn/shop/products/iag-02-14-wrx-04-21-sti-05-09-lgt-04-13-fxt-street-series-oil-pan-package-iag-eng-2201-8112980.jpg?v=1770331224&width=220)
![IAG [02 - 14 WRX, 04 - 21 STI, 05 - 09 LGT, 04 - 13 FXT] Street Series Oil Pan Package | IAG - ENG - 2201 - JDMuscleOil PansIAG-ENG-2201SLSilver](//jdmuscleusa.com/cdn/shop/products/iag-02-14-wrx-04-21-sti-05-09-lgt-04-13-fxt-street-series-oil-pan-package-iag-eng-2201-2248205.jpg?v=1770331225&width=220)
IAG Street Series Oil Pan Package
Fits: 02-14 WRX, 04-21 STI, 05-09 LGT, 04-13 FXT
Regular price From $699.99Sale price From $699.99 Regular priceUnit price per$699.99 -
![Gates [06-07 WRX, 04-19 STI, 05-09 LGT, 04-09 FXT] Timing Kit w/ Water Pump | TCKWP328](//jdmuscleusa.com/cdn/shop/products/gates-timing-kit-w-water-pump-wrx-2006-2007-sti-2004-2019-legacy-gt-2005-2009-forester-xt-2004-2009-tckwp328-timing-belt-components-gates-gattckwp328.jpg?v=1614528230&width=220)
In StockGates Timing Kit w/ Water Pump | TCKWP328
Fits: 06-07 WRX, 04-19 STI, 05-09 LGT, 04-09 FXT
Only 14 leftRegular price $421.00Sale price $421.00 Regular priceUnit price per$421.00 -
Up to $160 offPerrin Neon Yellow Air Oil Separator with Top Mount Intercooler | PSP-ENG-606NY
Fits: 08-14 WRX, 04-20 STI
Regular price $412.00Sale price $412.00 Regular priceUnit price per$572.00
![COBB [02 - 14 WRX, 07 - 21 STI, 07 - 12 Legacy GT, 06 - 13 Forester XT] Top Feed 1050X Fuel Injectors | 312150 - JDMuscleFuel Injectors and Accessoriescobb312150](http://jdmuscleusa.com/cdn/shop/products/cobb-02-14-wrx-07-21-sti-07-12-legacy-gt-06-13-forester-xt-top-feed-1050x-fuel-injectors-312150-5750979.jpg?v=1770336558&width=220)
![COBB [02 - 14 WRX, 07 - 21 STI, 07 - 12 Legacy GT, 06 - 13 Forester XT] Top Feed 1050X Fuel Injectors | 312150 - JDMuscleFuel Injectors and Accessoriescobb312150](http://jdmuscleusa.com/cdn/shop/products/cobb-02-14-wrx-07-21-sti-07-12-legacy-gt-06-13-forester-xt-top-feed-1050x-fuel-injectors-312150-9693839.jpg?v=1770336559&width=220)
![Seibon Carbon Fiber Hood/Trunk Prop w/ Seibon Logo [Universal] | HOODPROP-S](http://jdmuscleusa.com/cdn/shop/products/seibon-carbon-fiber-hoodtrunk-prop-w-seibon-logo-universal-hoodprop-s-hood-dampers-seibon-seihoodprop-s.jpg?v=1614519856&width=220){kind=logo}
![Seibon Carbon Fiber Hood/Trunk Prop w/ Seibon Logo [Universal] | HOODPROP-S](http://jdmuscleusa.com/cdn/shop/files/Siebon_Authorized_Dealer_963508de-6254-4ebb-b06f-da40665ca67a.png?v=1738252169&width=220)
![GrimmSpeed [02-07 WRX / 04-21 STI] Air/Oil Separator | 078006](http://jdmuscleusa.com/cdn/shop/products/grimmspeed-air-oil-separator-subaru-sti-2004-2020-078006-air-oil-separators-grimmspeed-red-078006r-2.jpg?v=1614675538&width=220)
![GrimmSpeed [02-07 WRX / 04-21 STI] Air/Oil Separator | 078006](http://jdmuscleusa.com/cdn/shop/products/grimmspeed-air-oil-separator-subaru-sti-2004-2020-078006-air-oil-separators-grimmspeed-3.jpg?v=1614658553&width=220)
![Turbo XS [02 - 07 STI] Midpipe for Version 2 Catback Exhaust Systems | WS1 - MP - JDMuscleExhaust Mid PipestxsWS1-MP](http://jdmuscleusa.com/cdn/shop/products/turbo-xs-02-07-sti-midpipe-for-version-2-catback-exhaust-systems-ws1-mp-5742227.jpg?v=1770328393&width=220)
![Perrin [02 - 14 WRX, 04 - 21 STI] Belt Cover Hyper Pink | PSP - ENG - 150HP - JDMuscleBelt CoversperPSP-ENG-150HP](http://jdmuscleusa.com/cdn/shop/products/perrin-02-14-wrx-04-21-sti-belt-cover-hyper-pink-psp-eng-150hp-4918766.jpg?v=1770330553&width=220)
![Perrin [02 - 14 WRX, 04 - 21 STI] Belt Cover Hyper Pink | PSP - ENG - 150HP - JDMuscleBelt CoversperPSP-ENG-150HP](http://jdmuscleusa.com/cdn/shop/products/perrin-02-14-wrx-04-21-sti-belt-cover-hyper-pink-psp-eng-150hp-8528183.jpg?v=1770330553&width=220)
![IAG [02 - 14 WRX, 04 - 21 STI, 05 - 09 LGT, 04 - 13 FXT] Street Series Oil Pan Package | IAG - ENG - 2201 - JDMuscleOil PansIAG-ENG-2201SLSilver](http://jdmuscleusa.com/cdn/shop/products/iag-02-14-wrx-04-21-sti-05-09-lgt-04-13-fxt-street-series-oil-pan-package-iag-eng-2201-8112980.jpg?v=1770331224&width=220)
![IAG [02 - 14 WRX, 04 - 21 STI, 05 - 09 LGT, 04 - 13 FXT] Street Series Oil Pan Package | IAG - ENG - 2201 - JDMuscleOil PansIAG-ENG-2201SLSilver](http://jdmuscleusa.com/cdn/shop/products/iag-02-14-wrx-04-21-sti-05-09-lgt-04-13-fxt-street-series-oil-pan-package-iag-eng-2201-2248205.jpg?v=1770331225&width=220)
![Gates [06-07 WRX, 04-19 STI, 05-09 LGT, 04-09 FXT] Timing Kit w/ Water Pump | TCKWP328](http://jdmuscleusa.com/cdn/shop/products/gates-timing-kit-w-water-pump-wrx-2006-2007-sti-2004-2019-legacy-gt-2005-2009-forester-xt-2004-2009-tckwp328-timing-belt-components-gates-gattckwp328.jpg?v=1614528230&width=220)
