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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Up to $156 off
In StockPLM Power Driven Subaru EWG Up Pipe with Dump Tube 44mm
Only 8 leftRegular price $339.00Sale price $339.00 Regular priceUnit price per$495.00 -
![Grimmspeed [02-14 WRX / 04-21 STI] Top Mount Intercooler Silicone Coupler Kit Black](//jdmuscleusa.com/cdn/shop/products/grimmspeed-top-mount-intercooler-silicone-hose-kit-subaru-wrx-2002-2007-sti-2004-2020-090108-090109-intercooler-hose-kits-grimmspeed-black-grm090109.jpg?v=1614517802&width=220)
![Grimmspeed [02-14 WRX / 04-21 STI] Top Mount Intercooler Silicone Coupler Kit Black](//jdmuscleusa.com/cdn/shop/products/grimmspeed-top-mount-intercooler-silicone-hose-kit-subaru-wrx-2002-2007-sti-2004-2020-090108-090109-intercooler-hose-kits-grimmspeed-3.jpg?v=1614658473&width=220)
Grimmspeed Top Mount Intercooler Silicone Coupler Kit Black
Fits: 02-14 WRX / 04-21 STI
Regular price $135.00Sale price $135.00 Regular priceUnit price per$135.00 -
Up to $89 off
In StockTomei 08-14 WRX / 04-21 STI Equal Length Exhaust Manifold | TB6010-SB02B
Only 3 leftRegular price $801.00Sale price $801.00 Regular priceUnit price per$890.00 -
In StockGrimmSpeed Version 2 Turbo Heat Shield
Fits: 02-14 WRX, 04-21 STI, 05-12 LGT, 04-13 FXT
Only 12 leftRegular price From $110.00Sale price From $110.00 Regular priceUnit price per$110.00 -
![GrimmSpeed 3in Downpipe to Stock Cat-Back Adapter [Subaru Turbo Models inc. 15-21 WRX/STI] | 077044](//jdmuscleusa.com/cdn/shop/products/grimmspeed-3in-downpipe-adapter-for-subaru-077044-exhaust-gaskets-and-hardware-grimmspeed-grm077044.jpg?v=1614517852&width=220)
GrimmSpeed 3in Downpipe to Stock Cat-Back Adapter | 077044
Fits: Subaru Turbo Models inc. 15-21 WRX/STI
Regular price $81.00Sale price $81.00 Regular priceUnit price per$81.00 -
![COBB SF Intake Replacement Intake Filter [Subaru Models] | 712101 - For 712100,715100,724100 - JDMuscleAir Intake Filter Replacementscobb712101](//jdmuscleusa.com/cdn/shop/products/cobb-sf-intake-replacement-intake-filter-subaru-models-712101-for-712100715100724100-2623375.jpg?v=1770329179&width=220)
![COBB SF Intake Replacement Intake Filter [Subaru Models] | 712101 - For 712100,715100,724100 - JDMuscleAir Intake Filter Replacementscobb712101](//jdmuscleusa.com/cdn/shop/files/cobb-sf-intake-replacement-intake-filter-subaru-models-712101-for-712100715100724100-7806168.jpg?v=1770329179&width=220)
In StockCOBB SF Intake Replacement Intake Filter | 712101 - For 712100,715100,724100
Fits: Subaru Models
Regular price $68.00Sale price $68.00 Regular priceUnit price per$68.00 -
Up to $20.50 off
In StockPerrin Stiffi Battery Tie Down Black Subaru Models
Only 16 leftRegular price $61.50Sale price $61.50 Regular priceUnit price per$82.00 -
Up to $85.22 off
In StockFluidampr Balanced Damper
Fits: 02-14 WRX, 04-21 STI
Regular price $482.92Sale price $482.92 Regular priceUnit price per$568.14 -
Up to $434.20 off
In StockInvidia N1 Racing Titanium Tip Cat Back Exhaust WRX/STI 2002-2007 | HS02SW1GRT
Only 12 leftRegular price $956.00Sale price $956.00 Regular priceUnit price per$1,390.20 -
![HKS [02 - 25 WRX/STI, 13 - 21 BRZ/FRS/86] 1.1 Bar Limited Edition Radiator Cap | 15009 - AK004 - JDMuscleRadiator CapsHKS15009-AK004](//jdmuscleusa.com/cdn/shop/products/hks-02-25-wrxsti-13-21-brzfrs86-11-bar-limited-edition-radiator-cap-15009-ak004-2331844.jpg?v=1770332249&width=220)
![HKS [02 - 25 WRX/STI, 13 - 21 BRZ/FRS/86] 1.1 Bar Limited Edition Radiator Cap | 15009 - AK004 - JDMuscleRadiator CapsHKS15009-AK004](//jdmuscleusa.com/cdn/shop/products/hks-02-25-wrxsti-13-21-brzfrs86-11-bar-limited-edition-radiator-cap-15009-ak004-7878472.jpg?v=1770332250&width=220)
In StockHKS 1.1 Bar Limited Edition Radiator Cap
Fits: 02-26 WRX/STI, 13-21 BRZ/FRS/86
Regular price $42.00Sale price $42.00 Regular priceUnit price per$42.00 -
In StockWalbro 255LPH Fuel Pump + Kit
Fits: 02-07 WRX, 04-07 STI
Regular price $109.00Sale price $109.00 Regular priceUnit price per$0.00 -
![Perrin [02 - 25 WRX, 04 - 21 STI, 13 - 25 BRZ/FRS/86] Oil Fill Cap | PSP - ENG - 711 - JDMuscleOil CapsperPSP-ENG-711RDRed](//jdmuscleusa.com/cdn/shop/files/perrin-02-25-wrx-04-21-sti-13-25-brzfrs86-oil-fill-cap-psp-eng-711-3496812.png?v=1770332363&width=220)
![Perrin [02 - 25 WRX, 04 - 21 STI, 13 - 25 BRZ/FRS/86] Oil Fill Cap | PSP - ENG - 711 - JDMuscleOil CapsperPSP-ENG-711BKBlack](//jdmuscleusa.com/cdn/shop/products/perrin-02-25-wrx-04-21-sti-13-25-brzfrs86-oil-fill-cap-psp-eng-711-4476366.jpg?v=1770332363&width=220)
Up to $22 off
In StockPerrin Oil Fill Cap
Fits: 02-25 WRX, 04-21 STI, 13-25 BRZ/FRS/86
Regular price From $61.50Sale price From $61.50 Regular priceUnit price per$82.00 -
![PLM [02-14 WRX, 04-21 STI, 04-13 FXT, 05-09 LGT, 05-09 OBXT] Power Driven Up Pipe | PLM-SUB-UP-PIPE-IWG](//jdmuscleusa.com/cdn/shop/products/IMG_1887.jpg?v=1748367040&width=220)
Up to $54 off
In StockPLM Power Driven Up Pipe | PLM-SUB-UP-PIPE-IWG
Fits: 02-14 WRX, 04-21 STI, 04-13 FXT, 05-09 LGT, 05-09 OBXT
Only 7 leftRegular price $195.00Sale price $195.00 Regular priceUnit price per$249.00 -
![Perrin [02-07 WRX, 04-21 STI] Throttle Body Hose Red | PSP-ITR-301RD](//jdmuscleusa.com/cdn/shop/products/perrin-top-mount-intercooler-coupler-red-subaru-wrx-2002-2007-sti-2004-2019-psp-itr-301rd-intercooler-hose-kits-perrin-performance-papsp-itr-301rd.jpg?v=1737769454&width=220)
![Perrin [02-07 WRX, 04-21 STI] Throttle Body Hose Red | PSP-ITR-301RD](//jdmuscleusa.com/cdn/shop/products/perrin-top-mount-intercooler-coupler-red-subaru-wrx-2002-2007-sti-2004-2019-psp-itr-301rd-intercooler-hose-kits-perrin-performance-papsp-itr-301rd-2.jpg?v=1737769454&width=220)
Up to $11 off
In StockPerrin Throttle Body Hose Red
Fits: 02-07 WRX, 04-21 STI
Regular price $33.00Sale price $33.00 Regular priceUnit price per$44.00 -
Up to $35.65 off
In StockGo Fast Bits TMS Respons Hybrid Blow Off Valve | T9003
Fits: 02-07 WRX, 04-21 STI
Only 10 leftRegular price $320.85Sale price $320.85 Regular priceUnit price per$356.50 -
Up to $110 offPLM 02-14 WRX/ 04-21 STI Power Driven EWG 2-Bolt Up Pipe with Dump Tube 38mm | Also fits Baja Turbo 2004-2006 / Forester XT 2004-2013 / Legacy GT 2005-2009 / Turbo 1991-1994 / Outback XT 2005-2009 | PLM-SUB-UP-PIPE-EWG-38MM
Regular price $339.00Sale price $339.00 Regular priceUnit price per$449.00
![Grimmspeed [02-14 WRX / 04-21 STI] Top Mount Intercooler Silicone Coupler Kit Black](http://jdmuscleusa.com/cdn/shop/products/grimmspeed-top-mount-intercooler-silicone-hose-kit-subaru-wrx-2002-2007-sti-2004-2020-090108-090109-intercooler-hose-kits-grimmspeed-black-grm090109.jpg?v=1614517802&width=220)
![Grimmspeed [02-14 WRX / 04-21 STI] Top Mount Intercooler Silicone Coupler Kit Black](http://jdmuscleusa.com/cdn/shop/products/grimmspeed-top-mount-intercooler-silicone-hose-kit-subaru-wrx-2002-2007-sti-2004-2020-090108-090109-intercooler-hose-kits-grimmspeed-3.jpg?v=1614658473&width=220)
![GrimmSpeed 3in Downpipe to Stock Cat-Back Adapter [Subaru Turbo Models inc. 15-21 WRX/STI] | 077044](http://jdmuscleusa.com/cdn/shop/products/grimmspeed-3in-downpipe-adapter-for-subaru-077044-exhaust-gaskets-and-hardware-grimmspeed-grm077044.jpg?v=1614517852&width=220)
![COBB SF Intake Replacement Intake Filter [Subaru Models] | 712101 - For 712100,715100,724100 - JDMuscleAir Intake Filter Replacementscobb712101](http://jdmuscleusa.com/cdn/shop/products/cobb-sf-intake-replacement-intake-filter-subaru-models-712101-for-712100715100724100-2623375.jpg?v=1770329179&width=220)
![COBB SF Intake Replacement Intake Filter [Subaru Models] | 712101 - For 712100,715100,724100 - JDMuscleAir Intake Filter Replacementscobb712101](http://jdmuscleusa.com/cdn/shop/files/cobb-sf-intake-replacement-intake-filter-subaru-models-712101-for-712100715100724100-7806168.jpg?v=1770329179&width=220)
![HKS [02 - 25 WRX/STI, 13 - 21 BRZ/FRS/86] 1.1 Bar Limited Edition Radiator Cap | 15009 - AK004 - JDMuscleRadiator CapsHKS15009-AK004](http://jdmuscleusa.com/cdn/shop/products/hks-02-25-wrxsti-13-21-brzfrs86-11-bar-limited-edition-radiator-cap-15009-ak004-2331844.jpg?v=1770332249&width=220)
![HKS [02 - 25 WRX/STI, 13 - 21 BRZ/FRS/86] 1.1 Bar Limited Edition Radiator Cap | 15009 - AK004 - JDMuscleRadiator CapsHKS15009-AK004](http://jdmuscleusa.com/cdn/shop/products/hks-02-25-wrxsti-13-21-brzfrs86-11-bar-limited-edition-radiator-cap-15009-ak004-7878472.jpg?v=1770332250&width=220)
![Perrin [02 - 25 WRX, 04 - 21 STI, 13 - 25 BRZ/FRS/86] Oil Fill Cap | PSP - ENG - 711 - JDMuscleOil CapsperPSP-ENG-711RDRed](http://jdmuscleusa.com/cdn/shop/files/perrin-02-25-wrx-04-21-sti-13-25-brzfrs86-oil-fill-cap-psp-eng-711-3496812.png?v=1770332363&width=220)
![Perrin [02 - 25 WRX, 04 - 21 STI, 13 - 25 BRZ/FRS/86] Oil Fill Cap | PSP - ENG - 711 - JDMuscleOil CapsperPSP-ENG-711BKBlack](http://jdmuscleusa.com/cdn/shop/products/perrin-02-25-wrx-04-21-sti-13-25-brzfrs86-oil-fill-cap-psp-eng-711-4476366.jpg?v=1770332363&width=220)
![PLM [02-14 WRX, 04-21 STI, 04-13 FXT, 05-09 LGT, 05-09 OBXT] Power Driven Up Pipe | PLM-SUB-UP-PIPE-IWG](http://jdmuscleusa.com/cdn/shop/products/IMG_1887.jpg?v=1748367040&width=220)
![Perrin [02-07 WRX, 04-21 STI] Throttle Body Hose Red | PSP-ITR-301RD](http://jdmuscleusa.com/cdn/shop/products/perrin-top-mount-intercooler-coupler-red-subaru-wrx-2002-2007-sti-2004-2019-psp-itr-301rd-intercooler-hose-kits-perrin-performance-papsp-itr-301rd.jpg?v=1737769454&width=220)
![Perrin [02-07 WRX, 04-21 STI] Throttle Body Hose Red | PSP-ITR-301RD](http://jdmuscleusa.com/cdn/shop/products/perrin-top-mount-intercooler-coupler-red-subaru-wrx-2002-2007-sti-2004-2019-psp-itr-301rd-intercooler-hose-kits-perrin-performance-papsp-itr-301rd-2.jpg?v=1737769454&width=220)
