Optimize your Subaru STI 2015-2021 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.
2015-2021 Subaru WRX STI Engine Parts
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Up to $4.21 offTorque Solution 02-07 WRX / 04-21 STI HKS Blow Off Valve Adapter | TS-SU-HKS
Regular price $38.00Sale price $38.00 Regular priceUnit price per$42.21 -
![Torque Solution [02-07 WRX, 04-21 STI, 04-08 FXT] Turbo Inlet Hose - Black | TS-SU-463BK](//jdmuscleusa.com/cdn/shop/products/torque-solution-turbo-inlet-hose-black-02-07-subaru-wrx-04-19-sti-05-09-legacy-gt-04-13-ftx-turbo-inlet-hoses-and-pipes-torque-solution-tqsts-su-463bk.jpg?v=1614518827&width=220)
Up to $50.77 off
In StockTorque Solution Turbo Inlet Hose - Black | TS-SU-463BK
Fits: 02-07 WRX, 04-21 STI, 04-08 FXT
Only 9 leftRegular price $227.00Sale price $227.00 Regular priceUnit price per$277.77 -
Up to $98.98 off
In StockTurboXS RBV Blow Off Valve Kit WRX 2002-2007 / STI 2004-2019 | WS-RBV
Only 9 leftRegular price $226.00Sale price $226.00 Regular priceUnit price per$324.98 -
Up to $35.20 off
In StockTurboXS High Performance Manual Boost Controller - Universal | BC-HPBC
Regular price $141.00Sale price $141.00 Regular priceUnit price per$176.20 -
Up to $10.95 off
In StockTurbo XS Blow Off Valve Type-H Adapter Kit WRX 2002-2007 / STI 2004-2019 | H-WRXG4
Only 6 leftRegular price $53.00Sale price $53.00 Regular priceUnit price per$63.95 -
Turbo XS T Clamp Stainless Steel 104-112mm/4.1-4.5in - Universal | T104-112
Regular price $15.00Sale price $15.00 Regular priceUnit price per$15.00 -
In StockTurbo XS Aluminium Weld-On Type H Bov Flange - Universal | H-AL
Only 17 leftRegular price $16.00Sale price $16.00 Regular priceUnit price per$16.00 -
In StockTurbo XS Weld-on Mild Steel Type H Bov Adapter - Universal | H-MS
Regular price $16.00Sale price $16.00 Regular priceUnit price per$16.00 -
Up to $1.70 offTurbosmart Rocket Launcher Switch - Universal
Regular price $15.29Sale price $15.29 Regular priceUnit price per$16.99 -
Up to $51 off
In StockTurboSmart E-Boost Street Electronic Boost Controller - Universal
Only 3 leftRegular price $458.99Sale price $458.99 Regular priceUnit price per$509.99 -
Up to $4.40 off
In StockTurbosmart WG38/40/45/IWG 11PSI Middle Spring Brown/Red - Universal
Only 3 leftRegular price $39.59Sale price $39.59 Regular priceUnit price per$43.99 -
Up to $45.50 off
In StockTurbosmart Black Dual Port Blow Off Valve WRX 2002-2007 / STI 2004-21 / Forester XT 2004-2008
Only 6 leftRegular price $409.49Sale price $409.49 Regular priceUnit price per$454.99 -
Up to $43.70 offTurbosmart Blue Plumb Back Blow Off Valve | 0205-1215
Fits: 02-07 WRX, 04-21 STI
Regular price $393.29Sale price $393.29 Regular priceUnit price per$436.99 -
Up to $43.70 offTurbosmart Black Plumb Back Blow Off Valve | 0205-1216
Fits: 02-07 WRX, 04-21 STI
Regular price $393.29Sale price $393.29 Regular priceUnit price per$436.99 -
Up to $43.10 offTurbosmart Blue Supersonic Blow Off Valve | 0205-1315
Fits: 02-07 WRX, 04-21 STI
Regular price $387.89Sale price $387.89 Regular priceUnit price per$430.99 -
Up to $28.10 off
In StockTurbosmart Vee-Port Blow Off Valve - Black | 0205-1136
Fits: 02-07 WRX, 04-21 STI
Only 3 leftRegular price $252.89Sale price $252.89 Regular priceUnit price per$280.99
![Torque Solution [02-07 WRX, 04-21 STI, 04-08 FXT] Turbo Inlet Hose - Black | TS-SU-463BK](http://jdmuscleusa.com/cdn/shop/products/torque-solution-turbo-inlet-hose-black-02-07-subaru-wrx-04-19-sti-05-09-legacy-gt-04-13-ftx-turbo-inlet-hoses-and-pipes-torque-solution-tqsts-su-463bk.jpg?v=1614518827&width=220)
