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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![TR [02 - 07 WRX, 04 - 21 STI] GTX3076 Turbo w/ Billet Wheel - JDMuscleTurbosTR-TS10461.3 bar](//jdmuscleusa.com/cdn/shop/products/tr-02-07-wrx-04-21-sti-gtx3076-turbo-w-billet-wheel-8387249.jpg?v=1770337995&width=220)
![TR [02 - 07 WRX, 04 - 21 STI] GTX3076 Turbo w/ Billet Wheel - JDMuscleTurbosTR-TS10461.3 bar](//jdmuscleusa.com/cdn/shop/products/tr-02-07-wrx-04-21-sti-gtx3076-turbo-w-billet-wheel-9918773.jpg?v=1770337995&width=220)
TR GTX3076 Turbo w/ Billet Wheel
Fits: 02-07 WRX, 04-21 STI
Regular price $2,470.00Sale price $2,470.00 Regular priceUnit price per$2,150.00 -
TR GTX2971 Twin Scroll for WRX 2002-2007 / STi 2004-2018 | TR-TS1047
Regular price $2,130.00Sale price $2,130.00 Regular priceUnit price per$1,850.00 -
TR Silicone Turbo Inlet for Subaru Impreza 2008-2018 / WRX 2008-2018 / STI 2008-2018 | TR-HS1004-PARENT
Regular price $250.00Sale price $250.00 Regular priceUnit price per$220.00 -
![Injen [08-14 WRX, 08+ STI, 09-11 FXT] Downpipe Catted Divorced Wastegate | SES1205DP - JDMuscleFront Pipes and Downpipes / J-PipesinjSES1205DP](//jdmuscleusa.com/cdn/shop/products/injen-08-14-wrx-08-sti-09-11-fxt-downpipe-catted-divorced-wastegate-ses1205dp-7488538.jpg?v=1781013625&width=220)
![Injen [08-14 WRX, 08+ STI, 09-11 FXT] Downpipe Catted Divorced Wastegate | SES1205DP - JDMuscleFront Pipes and Downpipes / J-PipesinjSES1205DP](//jdmuscleusa.com/cdn/shop/products/injen-08-14-wrx-08-sti-09-11-fxt-downpipe-catted-divorced-wastegate-ses1205dp-2152053.jpg?v=1781013625&width=220)
Injen Downpipe Catted Divorced Wastegate | SES1205DP
Fits: 08-14 WRX, 08+ STI, 09-11 FXT
Regular price $664.95Sale price $664.95 Regular priceUnit price per$664.95 -
Forced Performance Black HTZ Turbocharger WRX 2002-2007 / STI 2004+ | 2025150
Regular price $8,391.00Sale price $8,391.00 Regular priceUnit price per$8,391.00 -
Forced Performance XR Black Turbocharger EWG WRX 2002-2007 / STI 2004+ | 2027062
Regular price $14,743.00Sale price $14,743.00 Regular priceUnit price per$14,743.00 -
Killer B Motorsport 02-14 WRX / 04-21 STI High Flow Style Oil Pickup | 110-HF
Regular price $181.00Sale price $181.00 Regular priceUnit price per$181.00 -
In StockK&N Orion Air Cleaner Assembly Intake Syatem Universal | 54-5000
Only 2 leftRegular price $212.99Sale price $212.99 Regular priceUnit price per$212.99 -
K&N Air Filter with Carbon Fiber Top & Base-12in Base O/S Length x 6in Base O/S Width x 7in H Universal | RP-5103
Regular price $184.79Sale price $184.79 Regular priceUnit price per$184.79 -
In StockK&N Chrome Oval Tapered Filter 2.125inFlgID x 4inBOL x 3inBOW x 3inTOL x 2inTOW x 2.75inH Universal | RC-0984
Only 17 leftRegular price $167.99Sale price $167.99 Regular priceUnit price per$167.99 -
In StockK&N Apollo Black Cold Air Intake System 70mm OD FLG PP Universal | RC-5052AB
Only 5 leftRegular price $212.99Sale price $212.99 Regular priceUnit price per$212.99 -
In StockK&N 18-21 STI Typhoon Air Intake System Red w/ Air Box | 69-8009TWR
Only 4 leftRegular price $317.99Sale price $317.99 Regular priceUnit price per$317.99 -
In StockK&N Performance Short Ram Intake System Red WRX 2.5L H4 15-2017 / STI 2.5L H4 15-2017 | 69-8007TWR
Only 4 leftRegular price $369.99Sale price $369.99 Regular priceUnit price per$369.99 -
TR Timing Belt Guide Subaru 2002-2014 WRX / 2004+ STI | TR-AS1001
Regular price $60.00Sale price $60.00 Regular priceUnit price per$55.00 -
Tomioka Racing Lightweight Crank Pulley Subaru 2002-2014 WRX / 2004+ STI | TR-TM2040
Regular price $160.00Sale price $160.00 Regular priceUnit price per$140.00 -
TR Oil Cooler Kit With Thermostat WRX 2008+ / STi 2008+ | TR-ES2038
Regular price $710.00Sale price $710.00 Regular priceUnit price per$620.00
![TR [02 - 07 WRX, 04 - 21 STI] GTX3076 Turbo w/ Billet Wheel - JDMuscleTurbosTR-TS10461.3 bar](http://jdmuscleusa.com/cdn/shop/products/tr-02-07-wrx-04-21-sti-gtx3076-turbo-w-billet-wheel-8387249.jpg?v=1770337995&width=220)
![TR [02 - 07 WRX, 04 - 21 STI] GTX3076 Turbo w/ Billet Wheel - JDMuscleTurbosTR-TS10461.3 bar](http://jdmuscleusa.com/cdn/shop/products/tr-02-07-wrx-04-21-sti-gtx3076-turbo-w-billet-wheel-9918773.jpg?v=1770337995&width=220)
![Injen [08-14 WRX, 08+ STI, 09-11 FXT] Downpipe Catted Divorced Wastegate | SES1205DP - JDMuscleFront Pipes and Downpipes / J-PipesinjSES1205DP](http://jdmuscleusa.com/cdn/shop/products/injen-08-14-wrx-08-sti-09-11-fxt-downpipe-catted-divorced-wastegate-ses1205dp-7488538.jpg?v=1781013625&width=220)
![Injen [08-14 WRX, 08+ STI, 09-11 FXT] Downpipe Catted Divorced Wastegate | SES1205DP - JDMuscleFront Pipes and Downpipes / J-PipesinjSES1205DP](http://jdmuscleusa.com/cdn/shop/products/injen-08-14-wrx-08-sti-09-11-fxt-downpipe-catted-divorced-wastegate-ses1205dp-2152053.jpg?v=1781013625&width=220)
