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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![Mishimoto [02-07 WRX, 04-21 STI, 04-08 FXT] Turbo Inlet Hose Black | MMHOSE-SUB-IHBK](//jdmuscleusa.com/cdn/shop/products/mishimoto-black-silicone-turbo-inlet-hose-subaru-wrx-2002-2007-sti-2004-2019-turbo-inlet-hoses-and-pipes-mishimoto-mmhose-sub-ihbk-2.jpg?v=1746735998&width=220)
![Mishimoto [02-07 WRX, 04-21 STI, 04-08 FXT] Turbo Inlet Hose Black | MMHOSE-SUB-IHBK](//jdmuscleusa.com/cdn/shop/products/mishimoto-black-silicone-turbo-inlet-hose-subaru-wrx-2002-2007-sti-2004-2019-turbo-inlet-hoses-and-pipes-mishimoto-mmhose-sub-ihbk.jpg?v=1746735998&width=220)
Up to $28.05 off
In StockMishimoto Turbo Inlet Hose Black | MMHOSE-SUB-IHBK
Fits: 02-07 WRX, 04-21 STI, 04-08 FXT
Only 4 leftRegular price $276.95Sale price $276.95 Regular priceUnit price per$305.00 -
SteamSpeed STX 71 Turbocharger 8cm WRX 2002-2007 / STI 2004-2020
Regular price $1,399.00Sale price $1,399.00 Regular priceUnit price per$0.00 -
SteamSpeed STX 76 Turbocharger 8cm WRX 2002-2007 / STI 2004-2020
Regular price $1,499.00Sale price $1,499.00 Regular priceUnit price per$0.00 -
SteamSpeed STX 71+ 10cm Turbocharger WRX 2002-2007 / STI 2004-2020
Regular price $1,449.00Sale price $1,449.00 Regular priceUnit price per$0.00 -
SteamSpeed STX 76+ 10cm Turbocharger WRX 2002-2007 / STI 2004-2020
Regular price $1,549.00Sale price $1,549.00 Regular priceUnit price per$0.00 -
SteamSpeed STX 71R Ball Bearing Turbocharger WRX 2002-2007 / STI 2004-2020
Regular price $1,599.00Sale price $1,599.00 Regular priceUnit price per$0.00 -
SteamSpeed STX 76 Ball Bearing Turbocharger 8cm WRX 2002-2007 / STI 2004-2020
Regular price $1,699.00Sale price $1,699.00 Regular priceUnit price per$0.00 -
Up to $26.18 offSnow Performance Safe Injection Wastegate Solenoid- Universal
Regular price $65.47Sale price $65.47 Regular priceUnit price per$91.65 -
Snow Performance Safe Injection Boost Controller Bypass Relay | with Harness - Universal
Regular price $29.99Sale price $29.99 Regular priceUnit price per$0.00 -
HOA 3-Port Boost Control Solenoid - Universal
Regular price $94.99Sale price $94.99 Regular priceUnit price per$0.00 -
Up to $158 off
In StockTomei 02-07 WRX / 04-21 STI ARMS MX7760 Turbo | TB401A-SB01A
Only 3 leftRegular price $1,422.00Sale price $1,422.00 Regular priceUnit price per$1,580.00 -
Up to $158 off
In StockTomei ARMS MX8265 Turbocharger WRX 2002-2007 / STI 2004-2020
Only 4 leftRegular price $1,422.00Sale price $1,422.00 Regular priceUnit price per$1,580.00 -
Up to $69.47 off
In StockManley Turbo Tuff Connecting Rod Set w/ ARP 625+ Bolts WRX/STI | EJ205/EJ257 2002-2019 | 14416R6-4
Only 6 leftRegular price $1,319.86Sale price $1,319.86 Regular priceUnit price per$1,389.33 -
Up to $165 offGarrett GTX4294R A/R .60 Turbocharger - Universal
Regular price $2,475.01Sale price $2,475.01 Regular priceUnit price per$2,640.01 -
Up to $147.83 offGarrett GTX4088R Super Core A.R .72 Turbocharger - Universal
Regular price $2,217.45Sale price $2,217.45 Regular priceUnit price per$2,365.28 -
Up to $102.17 offGarrett GTX2976R Super Core AR .60 Turbocharger - Universal
Regular price $1,532.56Sale price $1,532.56 Regular priceUnit price per$1,634.73
![Mishimoto [02-07 WRX, 04-21 STI, 04-08 FXT] Turbo Inlet Hose Black | MMHOSE-SUB-IHBK](http://jdmuscleusa.com/cdn/shop/products/mishimoto-black-silicone-turbo-inlet-hose-subaru-wrx-2002-2007-sti-2004-2019-turbo-inlet-hoses-and-pipes-mishimoto-mmhose-sub-ihbk-2.jpg?v=1746735998&width=220)
![Mishimoto [02-07 WRX, 04-21 STI, 04-08 FXT] Turbo Inlet Hose Black | MMHOSE-SUB-IHBK](http://jdmuscleusa.com/cdn/shop/products/mishimoto-black-silicone-turbo-inlet-hose-subaru-wrx-2002-2007-sti-2004-2019-turbo-inlet-hoses-and-pipes-mishimoto-mmhose-sub-ihbk.jpg?v=1746735998&width=220)
