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 $45.50 off
In StockTurbosmart 02-07 WRX / 04-21 STI / 06-08 FXT Dual Port Blow Off Valve Black | TS-0205-1016
Only 7 leftRegular price $409.49Sale price $409.49 Regular priceUnit price per$454.99 -
MAPerformance 4-1 Equal Length Header Subaru STI 2004-2020 | SUB-ELH-REV2-PARENT
Regular price From $1,199.99Sale price From $1,199.99 Regular priceUnit price per -
Cobb Stainless Steel 3-inch Cat Back Exhaust
Fits: 02-07 WRX/STI
Regular price $905.00Sale price $905.00 Regular priceUnit price per$905.00 -
![Torque Solution [02-14 WRX, 07-20 STI, 08-12 LGT, 06-13 FXT] Top Feed Fuel Rails Black](//jdmuscleusa.com/cdn/shop/files/TS-SU-400BK.2-2.jpg?v=1784900856&width=220)
![Torque Solution [02-14 WRX, 07-20 STI, 08-12 LGT, 06-13 FXT] Top Feed Fuel Rails Black](//jdmuscleusa.com/cdn/shop/files/TS-SU-400BK.2-3.jpg?v=1784900856&width=220)
Up to $38.21 off
In StockTorque Solution Top Feed Fuel Rails Black
Fits: 02-14 WRX, 07-20 STI, 08-12 LGT, 06-13 FXT
Only 4 leftRegular price $184.00Sale price $184.00 Regular priceUnit price per$222.21 -
![Injen [02-07 WRX, 04-07 STI] Short Ram Air Intake System - Black | IS1200BLK - JDMuscleIntakesinjIS1200BLK](//jdmuscleusa.com/cdn/shop/products/injen-02-07-wrx-04-07-sti-short-ram-air-intake-system-black-is1200blk-8354837.jpg?v=1781013550&width=220)
![Injen [02-07 WRX, 04-07 STI] Short Ram Air Intake System - Black | IS1200BLK - JDMuscleIntakesinjIS1200BLK](//jdmuscleusa.com/cdn/shop/products/injen-02-07-wrx-04-07-sti-short-ram-air-intake-system-black-is1200blk-6679931.jpg?v=1781013550&width=220)
Injen Short Ram Air Intake System - Black | IS1200BLK
Fits: 02-07 WRX, 04-07 STI
Regular price $283.06Sale price $283.06 Regular priceUnit price per$283.06 -
![Forced Performance [02-07 WRX, 04-21 STI, 04-08 FXT] 84mm Turbo Inlet | 8005010A - JDMuscleTurbo Inlet Hoses and PipesFPT8005010A](//jdmuscleusa.com/cdn/shop/products/forced-performance-02-07-wrx-04-21-sti-04-08-fxt-84mm-turbo-inlet-8005010a-8075027.jpg?v=1781014154&width=220)
Forced Performance 84mm Turbo Inlet | 8005010A
Fits: 02-07 WRX, 04-21 STI, 04-08 FXT
Regular price $1,022.00Sale price $1,022.00 Regular priceUnit price per$1,022.00 -
Killer B Motorsport 02-14 WRX / 04-21 STI Super G Series Cast High Performance Oil Pan | EJ25PAN-G
Regular price $714.00Sale price $714.00 Regular priceUnit price per$714.00 -
In StockInjector Dynamics 02-14 WRX / 07-21 STI / 07-09 LGT / 06-08 FXT Fuel Injectors Top Feed 2600-XDS | 2600.48.11.WRX.4
Only 4 leftRegular price $1,593.90Sale price $1,593.90 Regular priceUnit price per$1,593.90 -
In StockInjector Dynamics ID1050X Fuel Injectors w/Top Feed Fuel Rails | 1050.18.01.48.14.4
Fits: 04-06 STI, 05-06 LGT
Only 9 leftRegular price $820.05Sale price $820.05 Regular priceUnit price per$820.05 -
In StockInjector Dynamics Fuel Injectors 1300cc w/ Top Feed Fuel Rails | 1300.18.01.48.14.4
Fits: 04-06 STI, 05-06 LGT
Only 3 leftRegular price $1,258.95Sale price $1,258.95 Regular priceUnit price per$1,258.95 -
![Cobb [02 - 07 WRX/STI, 04 - 08 Forester XT] GESi Catted 3 inch Downpipe - JDMuscleFront Pipes and Downpipes / J - Pipescobb512210](//jdmuscleusa.com/cdn/shop/products/cobb-02-07-wrxsti-04-08-forester-xt-gesi-catted-3-inch-downpipe-4117948.jpg?v=1775590691&width=220)
![Cobb [02 - 07 WRX/STI, 04 - 08 Forester XT] GESi Catted 3 inch Downpipe - JDMuscleFront Pipes and Downpipes / J - Pipescobb512210](//jdmuscleusa.com/cdn/shop/products/cobb-02-07-wrxsti-04-08-forester-xt-gesi-catted-3-inch-downpipe-3719673.jpg?v=1775590691&width=220)
Cobb GESi Catted 3 inch Downpipe
Fits: 02-07 WRX/STI, 04-08 Forester XT
Regular price $995.00Sale price $995.00 Regular priceUnit price per$995.00 -
Cobb 15mm Urethane Exhaust Hanger
Fits: 02-07 WRX/STI
Regular price $25.00Sale price $25.00 Regular priceUnit price per$25.00 -
![Perrin [02-07 WRX, 04-07 STI] Post MAF Hose - Red | PSP-INT-350RD - JDMuscleAir Intake and MAF HosesperPSP-INT-350RD](//jdmuscleusa.com/cdn/shop/products/perrin-02-07-wrx-04-07-sti-post-maf-hose-red-psp-int-350rd-4488373.jpg?v=1781013249&width=220)
Up to $31.75 off
In StockPerrin Post MAF Hose - Red | PSP-INT-350RD
Fits: 02-07 WRX, 04-07 STI
Only 5 leftRegular price $95.25Sale price $95.25 Regular priceUnit price per$127.00 -
![Tomei [06-14 WRX / 04+ STI] Head Gaskets 101.0 Bore 1.5MM Thickness | TOMTA4070-SB02D - JDMuscleHead GasketsTOMTA4070-SB02D](//jdmuscleusa.com/cdn/shop/products/tomei-06-14-wrx-04-sti-head-gaskets-1010-bore-15mm-thickness-tomta4070-sb02d-7740407.jpg?v=1781014150&width=220)
![Tomei [06-14 WRX / 04+ STI] Head Gaskets 101.0 Bore 1.5MM Thickness | TOMTA4070-SB02D - JDMuscleHead GasketsTOMTA4070-SB02D](//jdmuscleusa.com/cdn/shop/products/tomei-06-14-wrx-04-sti-head-gaskets-1010-bore-15mm-thickness-tomta4070-sb02d-8685208.jpg?v=1781014150&width=220)
Up to $12 off
In StockTomei Head Gaskets 101.0 Bore 1.5MM Thickness | TOMTA4070-SB02D
Fits: 06-14 WRX / 04+ STI
Only 5 leftRegular price $108.00Sale price $108.00 Regular priceUnit price per$120.00 -
![Tomei [06-14 WRX/04-21 STI] Head Gasket 101.0mm 1.0mm | TOMTA4070-SB02B - JDMuscleHead GasketsTOMTA4070-SB02B](//jdmuscleusa.com/cdn/shop/products/tomei-06-14-wrx04-21-sti-head-gasket-1010mm-10mm-tomta4070-sb02b-3302562.jpg?v=1781014150&width=220)
![Tomei [06-14 WRX/04-21 STI] Head Gasket 101.0mm 1.0mm | TOMTA4070-SB02B - JDMuscleHead GasketsTOMTA4070-SB02B](//jdmuscleusa.com/cdn/shop/products/tomei-06-14-wrx04-21-sti-head-gasket-1010mm-10mm-tomta4070-sb02b-5420424.jpg?v=1781014150&width=220)
Up to $12 off
In StockTomei Head Gasket 101.0mm 1.0mm | TOMTA4070-SB02B
Fits: 06-14 WRX/04-21 STI
Only 5 leftRegular price $108.00Sale price $108.00 Regular priceUnit price per$120.00 -
Up to $20 off
In StockTomei Timing Belt Subaru 2002-2014 WRX / 2004+ STI | TOMTB101A-SB01A
Only 5 leftRegular price $180.00Sale price $180.00 Regular priceUnit price per$200.00
![Torque Solution [02-14 WRX, 07-20 STI, 08-12 LGT, 06-13 FXT] Top Feed Fuel Rails Black](http://jdmuscleusa.com/cdn/shop/files/TS-SU-400BK.2-2.jpg?v=1784900856&width=220)
![Torque Solution [02-14 WRX, 07-20 STI, 08-12 LGT, 06-13 FXT] Top Feed Fuel Rails Black](http://jdmuscleusa.com/cdn/shop/files/TS-SU-400BK.2-3.jpg?v=1784900856&width=220)
![Injen [02-07 WRX, 04-07 STI] Short Ram Air Intake System - Black | IS1200BLK - JDMuscleIntakesinjIS1200BLK](http://jdmuscleusa.com/cdn/shop/products/injen-02-07-wrx-04-07-sti-short-ram-air-intake-system-black-is1200blk-8354837.jpg?v=1781013550&width=220)
![Injen [02-07 WRX, 04-07 STI] Short Ram Air Intake System - Black | IS1200BLK - JDMuscleIntakesinjIS1200BLK](http://jdmuscleusa.com/cdn/shop/products/injen-02-07-wrx-04-07-sti-short-ram-air-intake-system-black-is1200blk-6679931.jpg?v=1781013550&width=220)
![Forced Performance [02-07 WRX, 04-21 STI, 04-08 FXT] 84mm Turbo Inlet | 8005010A - JDMuscleTurbo Inlet Hoses and PipesFPT8005010A](http://jdmuscleusa.com/cdn/shop/products/forced-performance-02-07-wrx-04-21-sti-04-08-fxt-84mm-turbo-inlet-8005010a-8075027.jpg?v=1781014154&width=220)
![Cobb [02 - 07 WRX/STI, 04 - 08 Forester XT] GESi Catted 3 inch Downpipe - JDMuscleFront Pipes and Downpipes / J - Pipescobb512210](http://jdmuscleusa.com/cdn/shop/products/cobb-02-07-wrxsti-04-08-forester-xt-gesi-catted-3-inch-downpipe-4117948.jpg?v=1775590691&width=220)
![Cobb [02 - 07 WRX/STI, 04 - 08 Forester XT] GESi Catted 3 inch Downpipe - JDMuscleFront Pipes and Downpipes / J - Pipescobb512210](http://jdmuscleusa.com/cdn/shop/products/cobb-02-07-wrxsti-04-08-forester-xt-gesi-catted-3-inch-downpipe-3719673.jpg?v=1775590691&width=220)
![Perrin [02-07 WRX, 04-07 STI] Post MAF Hose - Red | PSP-INT-350RD - JDMuscleAir Intake and MAF HosesperPSP-INT-350RD](http://jdmuscleusa.com/cdn/shop/products/perrin-02-07-wrx-04-07-sti-post-maf-hose-red-psp-int-350rd-4488373.jpg?v=1781013249&width=220)
![Tomei [06-14 WRX / 04+ STI] Head Gaskets 101.0 Bore 1.5MM Thickness | TOMTA4070-SB02D - JDMuscleHead GasketsTOMTA4070-SB02D](http://jdmuscleusa.com/cdn/shop/products/tomei-06-14-wrx-04-sti-head-gaskets-1010-bore-15mm-thickness-tomta4070-sb02d-7740407.jpg?v=1781014150&width=220)
![Tomei [06-14 WRX / 04+ STI] Head Gaskets 101.0 Bore 1.5MM Thickness | TOMTA4070-SB02D - JDMuscleHead GasketsTOMTA4070-SB02D](http://jdmuscleusa.com/cdn/shop/products/tomei-06-14-wrx-04-sti-head-gaskets-1010-bore-15mm-thickness-tomta4070-sb02d-8685208.jpg?v=1781014150&width=220)
![Tomei [06-14 WRX/04-21 STI] Head Gasket 101.0mm 1.0mm | TOMTA4070-SB02B - JDMuscleHead GasketsTOMTA4070-SB02B](http://jdmuscleusa.com/cdn/shop/products/tomei-06-14-wrx04-21-sti-head-gasket-1010mm-10mm-tomta4070-sb02b-3302562.jpg?v=1781014150&width=220)
![Tomei [06-14 WRX/04-21 STI] Head Gasket 101.0mm 1.0mm | TOMTA4070-SB02B - JDMuscleHead GasketsTOMTA4070-SB02B](http://jdmuscleusa.com/cdn/shop/products/tomei-06-14-wrx04-21-sti-head-gasket-1010mm-10mm-tomta4070-sb02b-5420424.jpg?v=1781014150&width=220)
