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 $22.60 off
In StockAEM DryFlow Air Filter Kit 4in x 7in DRYFLOW - Universal | 21-2057DK
Regular price $50.39Sale price $50.39 Regular priceUnit price per$72.99 -
Up to $13.60 off
In StockAEM 2.75 inch Dryflow Air Filter with 9 inch Element - Universal | 21-2029DK
Only 14 leftRegular price $67.19Sale price $67.19 Regular priceUnit price per$80.79 -
Up to $565.30 offAEM Infinity 506 Stand-Alone Programmable Engine Management System - Universal | 30-7106
Regular price $1,506.92Sale price $1,506.92 Regular priceUnit price per$2,072.22 -
Subaru OEM Turbo Banjo Bolt with Screen Subaru STI 2004-2020 / WRX 2006-2014 | 14445AA090
Regular price $18.97Sale price $18.97 Regular priceUnit price per$18.97 -
In StockDeatschwerks Top Feed 565cc Injectors
Fits: 02-14 WRX, 07-21 STI, 07-12 LGT, 07-09 OBXT
Only 6 leftRegular price $379.00Sale price $379.00 Regular priceUnit price per$379.00 -
![Tomei [02-07 WRX/STI] Expreme Version 2 Stainless Race Downpipe - JDMuscleFront Pipes and Downpipes / J-PipesTOMTB6060-SB02A](//jdmuscleusa.com/cdn/shop/files/tomei-02-07-wrxsti-expreme-version-2-stainless-race-downpipe-3206100.webp?v=1781008931&width=220)
![Tomei [02-07 WRX/STI] Expreme Version 2 Stainless Race Downpipe - JDMuscleFront Pipes and Downpipes / J-PipesTOMTB6060-SB02A](//jdmuscleusa.com/cdn/shop/files/tomei-02-07-wrxsti-expreme-version-2-stainless-race-downpipe-3639222.jpg?v=1781008932&width=220)
Tomei Expreme Version 2 Stainless Race Downpipe
Fits: 02-07 WRX/STI
Regular price $690.00Sale price $690.00 Regular priceUnit price per$690.00 -
Up to $86.99 offTorque Solution HD Cast Aluminum Turbo Inlet 2.4-inch Hard Inlet Pipe
Fits: 02-07 WRX, 04-21 STI
Regular price $313.00Sale price $313.00 Regular priceUnit price per$399.99 -
Up to $183.06 off
In StockTurbo XS Rear Muffler Assembly w/ Titanium Tip | 053176486932
Fits: 02-07 WRX-STI
Only 12 leftRegular price $416.00Sale price $416.00 Regular priceUnit price per$599.06 -
In StockDeatschWerks Fuel Injectors 1200cc w/ Top Feed Fuel Rails
Fits: 02-14 WRX, 07-19 STI, 07-12 LGT
Only 1 leftRegular price $699.00Sale price $699.00 Regular priceUnit price per$699.00 -
![Forced Performance [STI/WRX] Blue Turbo BB LOPE 58mm CH8 CM Turbine Hsg Internal WG w/Oil Line | 2024000 - JDMuscleTurbosfpt2024000](//jdmuscleusa.com/cdn/shop/files/forced-performance-stiwrx-blue-turbo-bb-lope-58mm-ch8-cm-turbine-hsg-internal-wg-woil-line-2024000-4948865.jpg?v=1770325033&width=220)
In StockForced Performance Blue Turbo BB LOPE 58mm CH8 CM Turbine Hsg Internal WG w/Oil Line | 2024000
Fits: STI/WRX
Only 1 leftRegular price $1,799.00Sale price $1,799.00 Regular priceUnit price per$1,799.00 -
![Turbo XS [02-07 WRX, 04-07 STI] Short Ram Intake | WS-INTAKE](//jdmuscleusa.com/cdn/shop/files/turbo-xs-short-ram-intake-2002-2007-wrx-2004-2007-sti-txs-ws-intake-779628_600x500_35a69aab-b6f0-4c4c-b92a-514f5d86a91b.jpg?v=1748821078&width=220)
Up to $50.62 off
In StockTurbo XS Short Ram Intake | WS-INTAKE
Fits: 02-07 WRX, 04-07 STI
Only 15 leftRegular price $183.00Sale price $183.00 Regular priceUnit price per$233.62 -
Up to $20 off
In StockTomei High Performance Valve Spring Set Turbo Models
Fits: 02-14 WRX, 04-21 STI, 05-12 LGT, 04-13 FXT
Only 5 leftRegular price $180.00Sale price $180.00 Regular priceUnit price per$200.00 -
IAG 06-14 WRX, 04-21 STI Air / Oil Separator | AOS Competition to Street Series Conversion Kit | IAG-ENG-7113
Regular price $104.99Sale price $104.99 Regular priceUnit price per$104.99 -
![Gates [04 - 14 WRX, 04 - 21 STI] Racing Timing Belt Kit | TCK328RB - JDMuscleTiming Belt ComponentsTCK328RB](//jdmuscleusa.com/cdn/shop/files/gates-04-14-wrx-04-21-sti-racing-timing-belt-kit-tck328rb-4786491.jpg?v=1770327639&width=220)
Up to $1,363.03 offGates Racing Timing Belt Kit | TCK328RB
Fits: 04-14 WRX, 04-21 STI
Regular price $470.00Sale price $470.00 Regular priceUnit price per$1,833.03 -
![Cusco [02 - 14 WRX, 04 - 21 STI, 05 - 09 LGT] Aluminum Pulley Set | 6A1 - 733 - A - JDMusclePulleyscus6A1-733-A](//jdmuscleusa.com/cdn/shop/files/cusco-02-14-wrx-04-21-sti-05-09-lgt-aluminum-pulley-set-6a1-733-a-6902588.jpg?v=1770327688&width=220)
![Cusco [02 - 14 WRX, 04 - 21 STI, 05 - 09 LGT] Aluminum Pulley Set | 6A1 - 733 - A - JDMusclePulleyscus6A1-733-A](//jdmuscleusa.com/cdn/shop/files/cusco-02-14-wrx-04-21-sti-05-09-lgt-aluminum-pulley-set-6a1-733-a-2260376.jpg?v=1770327688&width=220)
Up to $54 offCusco Aluminum Pulley Set | 6A1-733-A
Fits: 02-14 WRX, 04-21 STI, 05-09 LGT
Regular price $486.00Sale price $486.00 Regular priceUnit price per$540.00 -
Up to $15.25 off
In StockPerrin 06-14 WRX / 07-21 STI / 12-16 Impreza / 06-13 FXT / 05-09 Legacy Alternator Pulley Blue | PSP-ENG-119BL
Only 4 leftRegular price $45.75Sale price $45.75 Regular priceUnit price per$61.00
![Tomei [02-07 WRX/STI] Expreme Version 2 Stainless Race Downpipe - JDMuscleFront Pipes and Downpipes / J-PipesTOMTB6060-SB02A](http://jdmuscleusa.com/cdn/shop/files/tomei-02-07-wrxsti-expreme-version-2-stainless-race-downpipe-3206100.webp?v=1781008931&width=220)
![Tomei [02-07 WRX/STI] Expreme Version 2 Stainless Race Downpipe - JDMuscleFront Pipes and Downpipes / J-PipesTOMTB6060-SB02A](http://jdmuscleusa.com/cdn/shop/files/tomei-02-07-wrxsti-expreme-version-2-stainless-race-downpipe-3639222.jpg?v=1781008932&width=220)
![Forced Performance [STI/WRX] Blue Turbo BB LOPE 58mm CH8 CM Turbine Hsg Internal WG w/Oil Line | 2024000 - JDMuscleTurbosfpt2024000](http://jdmuscleusa.com/cdn/shop/files/forced-performance-stiwrx-blue-turbo-bb-lope-58mm-ch8-cm-turbine-hsg-internal-wg-woil-line-2024000-4948865.jpg?v=1770325033&width=220)
![Turbo XS [02-07 WRX, 04-07 STI] Short Ram Intake | WS-INTAKE](http://jdmuscleusa.com/cdn/shop/files/turbo-xs-short-ram-intake-2002-2007-wrx-2004-2007-sti-txs-ws-intake-779628_600x500_35a69aab-b6f0-4c4c-b92a-514f5d86a91b.jpg?v=1748821078&width=220)
![Gates [04 - 14 WRX, 04 - 21 STI] Racing Timing Belt Kit | TCK328RB - JDMuscleTiming Belt ComponentsTCK328RB](http://jdmuscleusa.com/cdn/shop/files/gates-04-14-wrx-04-21-sti-racing-timing-belt-kit-tck328rb-4786491.jpg?v=1770327639&width=220)
![Cusco [02 - 14 WRX, 04 - 21 STI, 05 - 09 LGT] Aluminum Pulley Set | 6A1 - 733 - A - JDMusclePulleyscus6A1-733-A](http://jdmuscleusa.com/cdn/shop/files/cusco-02-14-wrx-04-21-sti-05-09-lgt-aluminum-pulley-set-6a1-733-a-6902588.jpg?v=1770327688&width=220)
![Cusco [02 - 14 WRX, 04 - 21 STI, 05 - 09 LGT] Aluminum Pulley Set | 6A1 - 733 - A - JDMusclePulleyscus6A1-733-A](http://jdmuscleusa.com/cdn/shop/files/cusco-02-14-wrx-04-21-sti-05-09-lgt-aluminum-pulley-set-6a1-733-a-2260376.jpg?v=1770327688&width=220)
