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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IAG Performance Blow Off Valve Adapter
Fits: 02-07 WRX, 04-21 STI
Regular price $49.99Sale price $49.99 Regular priceUnit price per$49.99 -
Cobb Tuning 4 Bar MAP Sensor - Sensor Only
Fits: 02-14 WRX, 04-21 STI, 05-08 Forester XT
Regular price $197.00Sale price $197.00 Regular priceUnit price per$197.00 -
In StockIAG Timing Belt Kit with IAG Red Racing Belt, Timing Guide, Adjustable Idlers & Tensioner
Fits: 02-14 WRX, 04-21 STI, 05-12 LGT, 04-13 FXT
Only 1 leftRegular price $699.99Sale price $699.99 Regular priceUnit price per$699.99 -
In StockIAG STI Big Bore 76mm Throttle Body w/ Electronics & Adapter Intake Manifolds | IAG-AFD-2027BK
Only 1 leftRegular price $414.99Sale price $414.99 Regular priceUnit price per$414.99 -
In StockIAG STI Big Bore 76mm Throttle Body w/ Electronics & Adapter Package Process West Intake Manifolds | IAG-AFD-2028BK
Only 1 leftRegular price $414.99Sale price $414.99 Regular priceUnit price per$414.99 -
Up to $7.05 off
In StockMishimoto Oil Block Sandwich Adaptor - Universal | MMOP-TPS
Only 11 leftRegular price $66.95Sale price $66.95 Regular priceUnit price per$74.00 -
COBB 3-Inch 2-Bolt Exhaust Gasket
Fits: Universal
Regular price $25.00Sale price $25.00 Regular priceUnit price per$25.00 -
![GrimmSpeed [Subaru Models inc. 02 - 14 WRX / 04 - 21 STI] Lightweight Crank Pulley Red | GRM095015R - JDMusclePulleysgrm095015R](//jdmuscleusa.com/cdn/shop/products/grimmspeed-subaru-models-inc-02-14-wrx-04-21-sti-lightweight-crank-pulley-red-grm095015r-6951138.jpg?v=1770329532&width=220)
![GrimmSpeed [Subaru Models inc. 02 - 14 WRX / 04 - 21 STI] Lightweight Crank Pulley Red | GRM095015R - JDMusclePulleysgrm095015R](//jdmuscleusa.com/cdn/shop/products/grimmspeed-subaru-models-inc-02-14-wrx-04-21-sti-lightweight-crank-pulley-red-grm095015r-2827011.jpg?v=1770329532&width=220)
In StockGrimmSpeed Lightweight Crank Pulley Red | GRM095015R
Fits: Subaru Models inc. 02-14 WRX / 04-21 STI
Only 1 leftRegular price $189.00Sale price $189.00 Regular priceUnit price per$189.00 -
COBB 3in Cat-Back Exhaust Replacement Hardware Kit - Gasket and Bolts
Fits: 02-07 WRX, 04-07 STI
Regular price $29.00Sale price $29.00 Regular priceUnit price per$29.00 -
In StockIAG Performance / ARP 14mm Head Stud Set Most Subaru Models
Only 1 leftRegular price $599.99Sale price $599.99 Regular priceUnit price per$599.99 -
In StockIAG V2 Alternator Relocation Kit for Reversed Intake Manifold for Multiple Subaru Fitments | IAG-ENG-5211
Only 2 leftRegular price $249.99Sale price $249.99 Regular priceUnit price per$249.99 -
![IAG [02 - 14 WRX, 04 - 21 STI, 05 - 09 LGT, 04 - 08 FXT] V2 Timing Belt Guide | IAG - ENG - 5101BK - JDMuscleTiming Belt ComponentsIAG-ENG-5101BK](//jdmuscleusa.com/cdn/shop/products/iag-02-14-wrx-04-21-sti-05-09-lgt-04-08-fxt-v2-timing-belt-guide-iag-eng-5101bk-9536642.jpg?v=1770331224&width=220)
![IAG [02 - 14 WRX, 04 - 21 STI, 05 - 09 LGT, 04 - 08 FXT] V2 Timing Belt Guide | IAG - ENG - 5101BK - JDMuscleTiming Belt ComponentsIAG-ENG-5101BK](//jdmuscleusa.com/cdn/shop/products/iag-02-14-wrx-04-21-sti-05-09-lgt-04-08-fxt-v2-timing-belt-guide-iag-eng-5101bk-6320311.jpg?v=1770331224&width=220)
In StockIAG V2 Timing Belt Guide
Fits: 02-14 WRX, 04-21 STI, 05-09 LGT, 04-08 FXT
Only 1 leftRegular price $59.99Sale price $59.99 Regular priceUnit price per$59.99 -
In StockCobb Tuning Delrin Oil Cap
Fits: 02-26 WRX/STI, 13-26 BRZ, 04-18 Forester XT, 05-12 Legacy GT/20-25 Legacy XT, 05-09 & 20-26 Outback XT, 19-26 Ascent, 13-16 FR-S, 17-21 GT86, 22-26 GR86
Only 5 leftRegular price $97.00Sale price $97.00 Regular priceUnit price per$97.00 -
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 8 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 -
In StockCobb Tuning Stainless Steel 3-Inch Cat-Back Exhaust
Fits: 02-07 WRX, 04-07 STI
Only 10 leftRegular price $905.00Sale price $905.00 Regular priceUnit price per$905.00
![GrimmSpeed [Subaru Models inc. 02 - 14 WRX / 04 - 21 STI] Lightweight Crank Pulley Red | GRM095015R - JDMusclePulleysgrm095015R](http://jdmuscleusa.com/cdn/shop/products/grimmspeed-subaru-models-inc-02-14-wrx-04-21-sti-lightweight-crank-pulley-red-grm095015r-6951138.jpg?v=1770329532&width=220)
![GrimmSpeed [Subaru Models inc. 02 - 14 WRX / 04 - 21 STI] Lightweight Crank Pulley Red | GRM095015R - JDMusclePulleysgrm095015R](http://jdmuscleusa.com/cdn/shop/products/grimmspeed-subaru-models-inc-02-14-wrx-04-21-sti-lightweight-crank-pulley-red-grm095015r-2827011.jpg?v=1770329532&width=220)
![IAG [02 - 14 WRX, 04 - 21 STI, 05 - 09 LGT, 04 - 08 FXT] V2 Timing Belt Guide | IAG - ENG - 5101BK - JDMuscleTiming Belt ComponentsIAG-ENG-5101BK](http://jdmuscleusa.com/cdn/shop/products/iag-02-14-wrx-04-21-sti-05-09-lgt-04-08-fxt-v2-timing-belt-guide-iag-eng-5101bk-9536642.jpg?v=1770331224&width=220)
![IAG [02 - 14 WRX, 04 - 21 STI, 05 - 09 LGT, 04 - 08 FXT] V2 Timing Belt Guide | IAG - ENG - 5101BK - JDMuscleTiming Belt ComponentsIAG-ENG-5101BK](http://jdmuscleusa.com/cdn/shop/products/iag-02-14-wrx-04-21-sti-05-09-lgt-04-08-fxt-v2-timing-belt-guide-iag-eng-5101bk-6320311.jpg?v=1770331224&width=220)
