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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![Moroso [06-07 WRX, 04-07 STI] Fuse Box Cover Fabricated Aluminum | 74231 - JDMuscleFuse Box Coversmor74231](//jdmuscleusa.com/cdn/shop/products/moroso-06-07-wrx-04-07-sti-fuse-box-cover-fabricated-aluminum-74231-1585392.jpg?v=1781013313&width=220)
![Moroso [06-07 WRX, 04-07 STI] Fuse Box Cover Fabricated Aluminum | 74231 - JDMuscleFuse Box Coversmor74231](//jdmuscleusa.com/cdn/shop/files/moroso-06-07-wrx-04-07-sti-fuse-box-cover-fabricated-aluminum-74231-1627055.jpg?v=1781013313&width=220)
Moroso Fuse Box Cover Fabricated Aluminum | 74231
Fits: 06-07 WRX, 04-07 STI
Regular price $65.99Sale price $65.99 Regular priceUnit price per$65.99 -
In StockInjector Dynamics 02-14 WRX / 07-21 STI ID1050X Top Feed Fuel Injectors | 1050.48.11.WRX.4
Regular price $600.60Sale price $600.60 Regular priceUnit price per$600.60 -
Injector Dynamics 02-14 WRX / 07-21 STI Fuel Injectors Top Feed 1700cc | 1700.48.11.WRX.4
Regular price $1,218.00Sale price $1,218.00 Regular priceUnit price per$1,218.00 -
In StockInjector Dynamics Side / Top Feed Conversion Line Kit Subaru STI 2004-2006 / Legacy GT 2005-2006 | SFC FLK
Only 5 leftRegular price $275.00Sale price $275.00 Regular priceUnit price per$275.00 -
![Cobb [02 - 07 WRX, 04 - 07 STI, 04 - 08 FXT] SF Airbox | 712160 - JDMuscleAir Boxescobb712160](//jdmuscleusa.com/cdn/shop/products/cobb-02-07-wrx-04-07-sti-04-08-fxt-sf-airbox-712160-9004082.jpg?v=1770336382&width=220)
![Cobb [02 - 07 WRX, 04 - 07 STI, 04 - 08 FXT] SF Airbox | 712160 - JDMuscleAir Boxescobb712160](//jdmuscleusa.com/cdn/shop/products/cobb-02-07-wrx-04-07-sti-04-08-fxt-sf-airbox-712160-6380881.jpg?v=1770336382&width=220)
In StockCobb Tuning SF Airbox - Wrinkle Black
Fits: 02-07 WRX, 04-07 STI, 04-08 Forester XT
Regular price $207.00Sale price $207.00 Regular priceUnit price per$207.00 -
![Cobb [06 - 14 WRX, 04 - 21 STI, 06 - 09 Legacy GT/Outback XT, 06 - 13 Forester XT] 2in Up Pipe - JDMuscleTurbo Uppipescobb512260](//jdmuscleusa.com/cdn/shop/products/cobb-06-14-wrx-04-21-sti-06-09-legacy-gtoutback-xt-06-13-forester-xt-2in-up-pipe-5151324.jpg?v=1775590815&width=220)
Cobb Tuning 2in Up Pipe
Fits: 06-14 WRX, 04-21 STI, 06-09 Legacy GT/Outback XT, 06-13 Forester XT
Regular price $256.00Sale price $256.00 Regular priceUnit price per$256.00 -
TR Twin Scroll High Flow Catless Downpipe | TR-ES1005
Fits: 02-07 WRX, 04-07 STI
Regular price $710.00Sale price $710.00 Regular priceUnit price per$620.00 -
![PLM Precision Works [08-14 WRX, 07-18 STI, 08-12 LGT, 08-13 FXT] Top Feed TGV Housing & Fuel Rail Kit - JDMuscleFuel RailsPW-TOP-FEED-FR-TGV-SUB-KIT](//jdmuscleusa.com/cdn/shop/products/plm-precision-works-08-14-wrx-07-18-sti-08-12-lgt-08-13-fxt-top-feed-tgv-housing-fuel-rail-kit-9379617.jpg?v=1786515612&width=220)
Up to $110 offPLM Precision Works Top Feed TGV Housing & Fuel Rail Kit
Fits: 08-14 WRX, 07-18 STI, 08-12 LGT, 08-13 FXT
Regular price $435.00Sale price $435.00 Regular priceUnit price per$545.00 -
![Tomei [06–14 WRX, 04–07 STI, 05–09 LGT, 04–13 FXT] Poncam Camshafts | TA301A-SB02A - JDMuscleCamsTOMTA301A-SB02A](//jdmuscleusa.com/cdn/shop/products/tomei-06-14-wrx-04-07-sti-05-09-lgt-04-13-fxt-poncam-camshafts-ta301a-sb02a-2883655.jpg?v=1781014153&width=220)
Up to $88 off
In StockTomei Poncam Camshafts | TA301A-SB02A
Fits: 06–14 WRX, 04–07 STI, 05–09 LGT, 04–13 FXT
Only 5 leftRegular price $792.00Sale price $792.00 Regular priceUnit price per$880.00 -
In StockETS 08-14 WRX / 04-21 STI V2 MaxFlow Header Exhaust Manifold | 200-10-EXM-PARENT
Only 9 leftRegular price $1,495.00Sale price $1,495.00 Regular priceUnit price per$1,495.00 -
In StockHKS 2 Layer Dry 200mm Red Replacement Filter Element - Universal
Regular price $29.00Sale price $29.00 Regular priceUnit price per$29.00 -
In StockHKS 02-07 WRX / 04-07 STI SSQV4 Blow Off Valve | 71008-AF006
Regular price $435.00Sale price $435.00 Regular priceUnit price per$435.00 -
Royal Purple Ultra Performance Grease - Universal
Regular price $20.00Sale price $20.00 Regular priceUnit price per$20.00 -
In StockNRG Fender Washer Kit FW-200 Titanium Burn - Universal | FW-200TT
Only 2 leftRegular price $44.00Sale price $44.00 Regular priceUnit price per$44.00 -
In StockNRG Classic White Wood Glowing Green Grain Steering Wheel - Universal | ST-015BK-GL
Only 3 leftRegular price $160.00Sale price $160.00 Regular priceUnit price per$160.00 -
Up to $8.20 off
In StockGates Micro-V Belt
Fits: 02-14 WRX, 04-21 STI, 04-09 FXT
Only 17 leftRegular price $44.00Sale price $44.00 Regular priceUnit price per$52.20
![Moroso [06-07 WRX, 04-07 STI] Fuse Box Cover Fabricated Aluminum | 74231 - JDMuscleFuse Box Coversmor74231](http://jdmuscleusa.com/cdn/shop/products/moroso-06-07-wrx-04-07-sti-fuse-box-cover-fabricated-aluminum-74231-1585392.jpg?v=1781013313&width=220)
![Moroso [06-07 WRX, 04-07 STI] Fuse Box Cover Fabricated Aluminum | 74231 - JDMuscleFuse Box Coversmor74231](http://jdmuscleusa.com/cdn/shop/files/moroso-06-07-wrx-04-07-sti-fuse-box-cover-fabricated-aluminum-74231-1627055.jpg?v=1781013313&width=220)
![Cobb [02 - 07 WRX, 04 - 07 STI, 04 - 08 FXT] SF Airbox | 712160 - JDMuscleAir Boxescobb712160](http://jdmuscleusa.com/cdn/shop/products/cobb-02-07-wrx-04-07-sti-04-08-fxt-sf-airbox-712160-9004082.jpg?v=1770336382&width=220)
![Cobb [02 - 07 WRX, 04 - 07 STI, 04 - 08 FXT] SF Airbox | 712160 - JDMuscleAir Boxescobb712160](http://jdmuscleusa.com/cdn/shop/products/cobb-02-07-wrx-04-07-sti-04-08-fxt-sf-airbox-712160-6380881.jpg?v=1770336382&width=220)
![Cobb [06 - 14 WRX, 04 - 21 STI, 06 - 09 Legacy GT/Outback XT, 06 - 13 Forester XT] 2in Up Pipe - JDMuscleTurbo Uppipescobb512260](http://jdmuscleusa.com/cdn/shop/products/cobb-06-14-wrx-04-21-sti-06-09-legacy-gtoutback-xt-06-13-forester-xt-2in-up-pipe-5151324.jpg?v=1775590815&width=220)
![PLM Precision Works [08-14 WRX, 07-18 STI, 08-12 LGT, 08-13 FXT] Top Feed TGV Housing & Fuel Rail Kit - JDMuscleFuel RailsPW-TOP-FEED-FR-TGV-SUB-KIT](http://jdmuscleusa.com/cdn/shop/products/plm-precision-works-08-14-wrx-07-18-sti-08-12-lgt-08-13-fxt-top-feed-tgv-housing-fuel-rail-kit-9379617.jpg?v=1786515612&width=220)
![Tomei [06–14 WRX, 04–07 STI, 05–09 LGT, 04–13 FXT] Poncam Camshafts | TA301A-SB02A - JDMuscleCamsTOMTA301A-SB02A](http://jdmuscleusa.com/cdn/shop/products/tomei-06-14-wrx-04-07-sti-05-09-lgt-04-13-fxt-poncam-camshafts-ta301a-sb02a-2883655.jpg?v=1781014153&width=220)
