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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In StockGrimmSpeed 02-14 WRX / 04-21 STI / 05-12 LGT / 04-13 FXT Phenolic Thermal Spacer 3mm | 018001
Only 1 leftRegular price $80.00Sale price $80.00 Regular priceUnit price per$80.00 -
In StockGrimmspeed Top Mount Intercooler Splitter - Subaru Scoop
Fits: 04-05 STI
Only 2 leftRegular price $306.00Sale price $306.00 Regular priceUnit price per$306.00 -
In StockGrimmspeed Hood Struts
Fits: 02-07 WRX/STI
Regular price $189.00Sale price $189.00 Regular priceUnit price per$189.00 -
![GrimmSpeed [02-07 WRX, 04-07 STI, 04-08 FXT] Cold Air Intake - Black | 060074](//jdmuscleusa.com/cdn/shop/products/grimmspeed-cold-air-intake-black-wrx-sti-2002-2007-forester-xt-2004-2008-060074-cold-air-intakes-grimmspeed-grm060074.jpg?v=1614517777&width=220)
![GrimmSpeed [02-07 WRX, 04-07 STI, 04-08 FXT] Cold Air Intake - Black | 060074](//jdmuscleusa.com/cdn/shop/products/grimmspeed-cold-air-intake-black-wrx-sti-2002-2007-forester-xt-2004-2008-060074-cold-air-intakes-grimmspeed-grm060074-2.jpg?v=1614675448&width=220)
In StockGrimmSpeed Cold Air Intake - Black | 060074
Fits: 02-07 WRX, 04-07 STI, 04-08 FXT
Only 1 leftRegular price $484.00Sale price $484.00 Regular priceUnit price per$484.00 -
Up to $38.05 off
In StockMishimoto R Line Intercooler Black - Universal
Only 3 leftRegular price $376.95Sale price $376.95 Regular priceUnit price per$415.00 -
Up to $35.05 off
In StockMishimoto M Line Intercooler Eat Sleep Race Edition G/G - Universal
Only 6 leftRegular price $351.95Sale price $351.95 Regular priceUnit price per$387.00 -
Up to $34.05 off
In StockMishimoto Aluminum Radiator 25in x 16in x 3in - Universal
Only 4 leftRegular price $339.95Sale price $339.95 Regular priceUnit price per$374.00 -
Up to $1.30 off
In StockCusco Exhaust Hanger 15mm
Fits: 02-07 WRX/STI
Only 20 leftRegular price $11.70Sale price $11.70 Regular priceUnit price per$13.00 -
Up to $17.50 off
In StockCusco Oil Catch Can .3L Capacity WRX/STI 2002-2007
Only 6 leftRegular price $157.50Sale price $157.50 Regular priceUnit price per$175.00 -
Up to $18 off
In StockAEM Boost Control Solenoid - Universal | 30-2400
Only 5 leftRegular price $143.95Sale price $143.95 Regular priceUnit price per$161.95 -
Up to $91 off
In StockAEM V2 5 Gallon Water/Methanol Injection Kit | Internal Map - Universal | 30-3301
Only 4 leftRegular price $727.95Sale price $727.95 Regular priceUnit price per$818.95 -
Up to $44 off
In StockAEM Ethanol Content Flex Fuel Sensor w/ -6AN fittings Kit - Universal | 30-2201
Only 4 leftRegular price $349.95Sale price $349.95 Regular priceUnit price per$393.95 -
![Cobb [Subaru STI] 6MT Stage 1+ Drivetrain Package - JDMuscleEngine Package Dealscobb215X01P-W-RD](//jdmuscleusa.com/cdn/shop/files/cobb-subaru-sti-6mt-stage-1-drivetrain-package-8750611.webp?v=1770318269&width=220)
![Cobb [Subaru STI] 6MT Stage 1+ Drivetrain Package - JDMuscleEngine Package Dealscobb215X01P-W-RD](//jdmuscleusa.com/cdn/shop/files/cobb-subaru-sti-6mt-stage-1-drivetrain-package-1103748.webp?v=1770318269&width=220)
In StockCobb Tuning Stage 1+ Drivetrain Package with Double Adjustable Shifter - White/Race Red
Fits: 04-21 STI 6MT
Only 8 leftRegular price $375.00Sale price $375.00 Regular priceUnit price per$375.00 -
![Cobb [Subaru STI] 6MT Stage 1+ Drivetrain Package - JDMuscleEngine Package Dealscobb215X01P-W-BK](//jdmuscleusa.com/cdn/shop/files/cobb-subaru-sti-6mt-stage-1-drivetrain-package-4281310.webp?v=1770318268&width=220)
![Cobb [Subaru STI] 6MT Stage 1+ Drivetrain Package - JDMuscleEngine Package Dealscobb215X01P-W-BK](//jdmuscleusa.com/cdn/shop/files/cobb-subaru-sti-6mt-stage-1-drivetrain-package-9844102.webp?v=1770318268&width=220)
In StockCobb Tuning Stage 1+ Drivetrain Package with Double Adjustable Shifter - White/Stealth Black
Fits: 04-21 STI 6MT
Only 8 leftRegular price $375.00Sale price $375.00 Regular priceUnit price per$375.00 -
![IAG [18 - 19 STI, 18 STi Type RA] Stage 1 Cylinder Head Package - JDMuscleCylinder Heads & Valvetrain ComponentsIAG-ENG-H550NENo Cams / Lifters Included](//jdmuscleusa.com/cdn/shop/files/iag-18-19-sti-18-sti-type-ra-stage-1-cylinder-head-package-9482150.jpg?v=1772964128&width=220)
![IAG [18 - 19 STI, 18 STi Type RA] Stage 1 Cylinder Head Package - JDMuscleCylinder Heads & Valvetrain ComponentsIAG-ENG-H550NENo Cams / Lifters Included](//jdmuscleusa.com/cdn/shop/products/iag-18-19-sti-18-sti-type-ra-stage-1-cylinder-head-package-6338798.jpg?v=1772964129&width=220)
Up to $460 off
In StockIAG Stage 1 Cylinder Head Package
Fits: 18-19 STI, 18 STi Type RA
Only 1 leftRegular price From $4,599.99Sale price From $4,599.99 Regular priceUnit price per$4,599.99 -
In StockIAG Performance Stage 2.5 International Hybrid EJ25 Subaru Closed Deck Short Block For EJ20 Heads
Only 1 leftRegular price $5,499.99Sale price $5,499.99 Regular priceUnit price per$4,899.99
![GrimmSpeed [02-07 WRX, 04-07 STI, 04-08 FXT] Cold Air Intake - Black | 060074](http://jdmuscleusa.com/cdn/shop/products/grimmspeed-cold-air-intake-black-wrx-sti-2002-2007-forester-xt-2004-2008-060074-cold-air-intakes-grimmspeed-grm060074.jpg?v=1614517777&width=220)
![GrimmSpeed [02-07 WRX, 04-07 STI, 04-08 FXT] Cold Air Intake - Black | 060074](http://jdmuscleusa.com/cdn/shop/products/grimmspeed-cold-air-intake-black-wrx-sti-2002-2007-forester-xt-2004-2008-060074-cold-air-intakes-grimmspeed-grm060074-2.jpg?v=1614675448&width=220)
![Cobb [Subaru STI] 6MT Stage 1+ Drivetrain Package - JDMuscleEngine Package Dealscobb215X01P-W-RD](http://jdmuscleusa.com/cdn/shop/files/cobb-subaru-sti-6mt-stage-1-drivetrain-package-8750611.webp?v=1770318269&width=220)
![Cobb [Subaru STI] 6MT Stage 1+ Drivetrain Package - JDMuscleEngine Package Dealscobb215X01P-W-RD](http://jdmuscleusa.com/cdn/shop/files/cobb-subaru-sti-6mt-stage-1-drivetrain-package-1103748.webp?v=1770318269&width=220)
![Cobb [Subaru STI] 6MT Stage 1+ Drivetrain Package - JDMuscleEngine Package Dealscobb215X01P-W-BK](http://jdmuscleusa.com/cdn/shop/files/cobb-subaru-sti-6mt-stage-1-drivetrain-package-4281310.webp?v=1770318268&width=220)
![Cobb [Subaru STI] 6MT Stage 1+ Drivetrain Package - JDMuscleEngine Package Dealscobb215X01P-W-BK](http://jdmuscleusa.com/cdn/shop/files/cobb-subaru-sti-6mt-stage-1-drivetrain-package-9844102.webp?v=1770318268&width=220)
![IAG [18 - 19 STI, 18 STi Type RA] Stage 1 Cylinder Head Package - JDMuscleCylinder Heads & Valvetrain ComponentsIAG-ENG-H550NENo Cams / Lifters Included](http://jdmuscleusa.com/cdn/shop/files/iag-18-19-sti-18-sti-type-ra-stage-1-cylinder-head-package-9482150.jpg?v=1772964128&width=220)
![IAG [18 - 19 STI, 18 STi Type RA] Stage 1 Cylinder Head Package - JDMuscleCylinder Heads & Valvetrain ComponentsIAG-ENG-H550NENo Cams / Lifters Included](http://jdmuscleusa.com/cdn/shop/products/iag-18-19-sti-18-sti-type-ra-stage-1-cylinder-head-package-6338798.jpg?v=1772964129&width=220)
