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
-
![Mishimoto [02-07 WRX, 04-21 STI, 04-08 FXT] Turbo Inlet Hose Red | MMHOSE-SUB-IHRD](//jdmuscleusa.com/cdn/shop/products/mishimoto-red-silicone-turbo-inlet-hose-subaru-wrx-2002-2007-sti-2004-2019-turbo-inlet-hoses-and-pipes-mishimoto-mmhose-sub-ihrd.jpg?v=1614515263&width=220)
![Mishimoto [02-07 WRX, 04-21 STI, 04-08 FXT] Turbo Inlet Hose Red | MMHOSE-SUB-IHRD](//jdmuscleusa.com/cdn/shop/products/mishimoto-red-silicone-turbo-inlet-hose-subaru-wrx-2002-2007-sti-2004-2019-turbo-inlet-hoses-and-pipes-mishimoto-mmhose-sub-ihrd-2.jpg?v=1614515264&width=220)
Up to $28.05 off
In StockMishimoto Turbo Inlet Hose Red | MMHOSE-SUB-IHRD
Fits: 02-07 WRX, 04-21 STI, 04-08 FXT
Only 3 leftRegular price $276.95Sale price $276.95 Regular priceUnit price per$305.00 -
Up to $18 off
In StockAEM Boost Control Solenoid - Universal | 30-2400
Only 15 leftRegular price $143.95Sale price $143.95 Regular priceUnit price per$161.95 -
Up to $158 off
In StockTomei 02-07 WRX / 04-21 STI ARMS MX7960 Turbo | TB401A-SB01B
Only 4 leftRegular price $1,422.00Sale price $1,422.00 Regular priceUnit price per$1,580.00 -
Garrett GTX4202R Super Core CHRA Turbocharger - Universal
Regular price $3,248.65Sale price $3,248.65 Regular priceUnit price per$3,248.65 -
CP Piston & Ring 100mm Bore 8:2 CR WRX/STI Subaru Turbo EJ255 / EJ257 Models 2004-2019
Regular price $679.00Sale price $679.00 Regular priceUnit price per$0.00 -
Up to $0.54 off
In StockTorque Solution Tial 38mm Wastegate Inlet Flange - Universal
Only 5 leftRegular price $25.00Sale price $25.00 Regular priceUnit price per$25.54 -
Up to $70 offPerrin Air Oil Separator Red w/ FMIC | PSP-ENG-607RD
Fits: 02-14 WRX, 04-21 STI, 05-09 LGT
Regular price $502.00Sale price $502.00 Regular priceUnit price per$572.00 -
Killer B Motorsport 02-14 WRX / 04-21 STI Oil Baffle Windage Tray | EJWT
Regular price $87.00Sale price $87.00 Regular priceUnit price per$87.00 -
Up to $3 off
In StockRadium Engineering Electrical Bulkhead Stud Kit | Pack of 6 - Universal
Only 15 leftRegular price $56.95Sale price $56.95 Regular priceUnit price per$59.95 -
In StockKing Engine Rod Bearings 52mm Journal Size WRX/STI EJ20/EJ22/EJ25 2002-2020
Regular price From $47.00Sale price From $47.00 Regular priceUnit price per$47.00 -
Up to $8.20 off
In StockGates Micro-V Belt WRX 2002-2014 / STI 2004-2019 / Forester XT 2004-2009 | K050345
Only 12 leftRegular price $44.00Sale price $44.00 Regular priceUnit price per$52.20 -
CP Piston Set 99.5mm Bore 10:1 CR WRX 2006-2014 / STI 2004-2019 Subaru Turbo 2.5L
Regular price $588.00Sale price $588.00 Regular priceUnit price per$0.00 -
![Brian Crower [08-21 STI] Stage 2 Camshafts | BC0623](//jdmuscleusa.com/cdn/shop/products/brian-crower-stage-2-camshafts-subaru-sti-2008-2019-cams-brian-crower-bc0623.jpg?v=1614520861&width=220)
In StockBrian Crower Stage 2 Camshafts | BC0623
Fits: 08-21 STI
Only 13 leftRegular price $965.00Sale price $965.00 Regular priceUnit price per$965.00 -
In StockBrian Crower 02-14 WRX / 04-21 STI Single Valve Springs | BC1600
Only 11 leftRegular price $96.00Sale price $96.00 Regular priceUnit price per$96.00 -
Up to $26.43 off
In StockTorque Solution AN Engine/Valve Cover Breather Fittings Subaru EJ25 Engines
Only 5 leftRegular price $118.00Sale price $118.00 Regular priceUnit price per$144.43 -
Up to $2.99 off
In StockTorque Solution Spark Plug Gap Tool 14mm - Universal
Only 3 leftRegular price $35.00Sale price $35.00 Regular priceUnit price per$37.99
![Mishimoto [02-07 WRX, 04-21 STI, 04-08 FXT] Turbo Inlet Hose Red | MMHOSE-SUB-IHRD](http://jdmuscleusa.com/cdn/shop/products/mishimoto-red-silicone-turbo-inlet-hose-subaru-wrx-2002-2007-sti-2004-2019-turbo-inlet-hoses-and-pipes-mishimoto-mmhose-sub-ihrd.jpg?v=1614515263&width=220)
![Mishimoto [02-07 WRX, 04-21 STI, 04-08 FXT] Turbo Inlet Hose Red | MMHOSE-SUB-IHRD](http://jdmuscleusa.com/cdn/shop/products/mishimoto-red-silicone-turbo-inlet-hose-subaru-wrx-2002-2007-sti-2004-2019-turbo-inlet-hoses-and-pipes-mishimoto-mmhose-sub-ihrd-2.jpg?v=1614515264&width=220)
![Brian Crower [08-21 STI] Stage 2 Camshafts | BC0623](http://jdmuscleusa.com/cdn/shop/products/brian-crower-stage-2-camshafts-subaru-sti-2008-2019-cams-brian-crower-bc0623.jpg?v=1614520861&width=220)
