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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![Cobb [06-14 WRX, 04-21 STI, 05-09 LGT, 04-08 FXT] Spark Plug Set One Step Colder | D44700](//jdmuscleusa.com/cdn/shop/products/b1aa4f1627c975827869c09c78278c4e.jpg?v=1660655055&width=220)
![Cobb [06 - 14 WRX, 04 - 21 STI, 05 - 09 LGT, 04 - 08 FXT] Spark Plug Set One Step Colder - JDMuscleSpark PlugscobbD44700](//jdmuscleusa.com/cdn/shop/files/cobb-06-14-wrx-04-21-sti-05-09-lgt-04-08-fxt-spark-plug-set-one-step-colder-1998864.jpg?v=1770330674&width=220)
In StockCobb Spark Plug Set One Step Colder
Fits: 06-14 WRX, 04-21 STI, 05-09 LGT, 04-08 FXT
Regular price $68.00Sale price $68.00 Regular priceUnit price per$68.00 -
![Tomei [02-07 WRX, 04-21 STI, 04-08 FXT] Silicone Turbo Inlet Hose - Black | TB301A-SB01B](//jdmuscleusa.com/cdn/shop/products/TB301A-SB01B.jpg?v=1669932204&width=220)
![Tomei [02-07 WRX, 04-21 STI, 04-08 FXT] Silicone Turbo Inlet Hose - Black | TB301A-SB01B](//jdmuscleusa.com/cdn/shop/products/TB301A-SB01B_1.jpg?v=1667810532&width=220)
Up to $19 off
In StockTomei Silicone Turbo Inlet Hose - Black | TB301A-SB01B
Fits: 02-07 WRX, 04-21 STI, 04-08 FXT
Only 5 leftRegular price $171.00Sale price $171.00 Regular priceUnit price per$190.00 -
GrimmSpeed Downpipe to Catback 3in Gasket - Universal | 022001
Regular price $42.00Sale price $42.00 Regular priceUnit price per$42.00 -
Up to $20.53 off
In StockARP Head Studs 11mm Subaru Turbo Models
Fits: 02-14 WRX, 04-21 STI, 05-12 LGT, 04-13 FXT
Regular price $283.00Sale price $283.00 Regular priceUnit price per$303.53 -
Subaru OEM 1.3 Bar Radiator Cap Subaru All Models
Regular price $76.95Sale price $76.95 Regular priceUnit price per$76.95 -
Up to $13.20 off
In StockTial 44mm MVR External Wastegate - Universal
Regular price From $439.95Sale price From $439.95 Regular priceUnit price per$453.15 -
Up to $217.99 offTurbo XS High Flow Catted Downpipe
Fits: 02-07 WRX/STI, 04-08 FXT
Regular price $616.00Sale price $616.00 Regular priceUnit price per$833.99 -
Up to $165.90 offPerrin Front Mount Intercooler Pipes
Fits: 02-07 WRX, 04-07 STI
Regular price $940.10Sale price $940.10 Regular priceUnit price per$1,106.00 -
In StockGrimmSpeed Head to Exhaust Manifold Gaskets | Pair Suabru Turbo Models | 020001
Only 2 leftRegular price $40.00Sale price $40.00 Regular priceUnit price per$40.00 -
In StockInjector Dynamics 1050cc Top Feed Fuel Injectors | 1050.48.11.WRX.4
Fits: 02-14 WRX, 07-21 STI
Regular price $600.60Sale price $600.60 Regular priceUnit price per$600.60 -
![Cobb [02 - 07 WRX, 04 - 21 STI] TD05H - 20G - 8 Turbocharger | E1120G - JDMuscleTurboscobbE1120G](//jdmuscleusa.com/cdn/shop/products/cobb-02-07-wrx-04-21-sti-td05h-20g-8-turbocharger-e1120g-6497348.jpg?v=1770336435&width=220)
![Cobb [02 - 07 WRX, 04 - 21 STI] TD05H - 20G - 8 Turbocharger | E1120G - JDMuscleTurboscobbE1120G](//jdmuscleusa.com/cdn/shop/products/cobb-02-07-wrx-04-21-sti-td05h-20g-8-turbocharger-e1120g-3149936.jpg?v=1770336436&width=220)
In StockCobb TD05H-20G-8 Turbocharger
Fits: 02-07 WRX, 04-21 STI
Regular price $1,470.00Sale price $1,470.00 Regular priceUnit price per$1,470.00 -
Forced Performance 04-21 Subaru STI/ 02-07 WRX FP GREEN 57S Turbocharger 84MM CH 8CM Turbine Housing External Wastegate Oil Line Included | 2029130
Regular price $7,374.00Sale price $7,374.00 Regular priceUnit price per$7,374.00 -
Up to $209 off
In StockPerrin Air Oil Separator Neon Yellow w/ FMIC
Fits: 02-14 WRX, 04-21 STI, 05-09 LGT
Only 1 leftRegular price $363.00Sale price $363.00 Regular priceUnit price per$572.00 -
Up to $89.40 offInvidia Uppipe No EGT Bung | HS06SW1UPP
Fits: 02-14 WRX, 04-21 STI
Regular price $311.00Sale price $311.00 Regular priceUnit price per$400.40 -
Up to $11 off
In StockPerrin Throttle Body Hose Black
Fits: 02-07 WRX, 04-21 STI
Regular price $33.00Sale price $33.00 Regular priceUnit price per$44.00 -
![Turbosmart [02 - 07 WRX, 04 - 21 STI] 34mm Blow Off Valve Plug | TS - 0205 - 2016 - JDMuscleBlow Off ValvesTBSTS-0205-2016](//jdmuscleusa.com/cdn/shop/products/turbosmart-02-07-wrx-04-21-sti-34mm-blow-off-valve-plug-ts-0205-2016-4504580.jpg?v=1770334633&width=220)
Up to $1.60 offTurbosmart 34mm Blow Off Valve Plug
Fits: 02-07 WRX, 04-21 STI
Regular price $14.39Sale price $14.39 Regular priceUnit price per$15.99
![Cobb [06-14 WRX, 04-21 STI, 05-09 LGT, 04-08 FXT] Spark Plug Set One Step Colder | D44700](http://jdmuscleusa.com/cdn/shop/products/b1aa4f1627c975827869c09c78278c4e.jpg?v=1660655055&width=220)
![Cobb [06 - 14 WRX, 04 - 21 STI, 05 - 09 LGT, 04 - 08 FXT] Spark Plug Set One Step Colder - JDMuscleSpark PlugscobbD44700](http://jdmuscleusa.com/cdn/shop/files/cobb-06-14-wrx-04-21-sti-05-09-lgt-04-08-fxt-spark-plug-set-one-step-colder-1998864.jpg?v=1770330674&width=220)
![Tomei [02-07 WRX, 04-21 STI, 04-08 FXT] Silicone Turbo Inlet Hose - Black | TB301A-SB01B](http://jdmuscleusa.com/cdn/shop/products/TB301A-SB01B.jpg?v=1669932204&width=220)
![Tomei [02-07 WRX, 04-21 STI, 04-08 FXT] Silicone Turbo Inlet Hose - Black | TB301A-SB01B](http://jdmuscleusa.com/cdn/shop/products/TB301A-SB01B_1.jpg?v=1667810532&width=220)
![Cobb [02 - 07 WRX, 04 - 21 STI] TD05H - 20G - 8 Turbocharger | E1120G - JDMuscleTurboscobbE1120G](http://jdmuscleusa.com/cdn/shop/products/cobb-02-07-wrx-04-21-sti-td05h-20g-8-turbocharger-e1120g-6497348.jpg?v=1770336435&width=220)
![Cobb [02 - 07 WRX, 04 - 21 STI] TD05H - 20G - 8 Turbocharger | E1120G - JDMuscleTurboscobbE1120G](http://jdmuscleusa.com/cdn/shop/products/cobb-02-07-wrx-04-21-sti-td05h-20g-8-turbocharger-e1120g-3149936.jpg?v=1770336436&width=220)
![Turbosmart [02 - 07 WRX, 04 - 21 STI] 34mm Blow Off Valve Plug | TS - 0205 - 2016 - JDMuscleBlow Off ValvesTBSTS-0205-2016](http://jdmuscleusa.com/cdn/shop/products/turbosmart-02-07-wrx-04-21-sti-34mm-blow-off-valve-plug-ts-0205-2016-4504580.jpg?v=1770334633&width=220)