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 $0.54 offTorque Solution Tial 44mm Wastegate Inlet Flange - Universal
Regular price $25.00Sale price $25.00 Regular priceUnit price per$25.54 -
Up to $0.54 off
In StockTorque Solution Tial 44mm Wastegate Outlet Flange - Universal
Only 1 leftRegular price $25.00Sale price $25.00 Regular priceUnit price per$25.54 -
Wiseco BoostLine Connecting Rod - Single | Subaru EJ20/EJ25 Turbo Engines | SB5137-905S
Regular price From $274.99Sale price From $274.99 Regular priceUnit price per$274.99 -
In StockWiseco BoostLine Connecting Rod Kit | Subaru EJ20/EJ25 Turbo Engines | SB5137-905
Only 6 leftRegular price From $799.99Sale price From $799.99 Regular priceUnit price per$799.99 -
Wiseco Sport Compact -23cc Pistons | Subaru EJ25 Non-Turbo | K599M
Regular price $768.99Sale price $768.99 Regular priceUnit price per$768.99 -
Verus Engineering 13-23 BRZ / 22-23 GR86 / 15-25 WRX/ 08-21 STI AOS Coolant Add On | A0070A
Regular price $90.20Sale price $90.20 Regular priceUnit price per$82.00 -
Up to $15 off
In StockRadium Engineering Air Oil Separator - Universal Kit
Only 2 leftRegular price $284.95Sale price $284.95 Regular priceUnit price per$299.95 -
Up to $6 offVibrant Oil Drain Flange for GT25R GT28R GT30R and GT35R Ball Bearing Turbo Billet Aluminum - Universal
Regular price $17.99Sale price $17.99 Regular priceUnit price per$23.99 -
Up to $40 off
In StockVibrant SS TurboFlex Coupling with Interlock Liner - Universal
Regular price From $30.59Sale price From $30.59 Regular priceUnit price per$0.00 -
Tial 41mm External Wastegate - Universal
Regular price $353.00Sale price $353.00 Regular priceUnit price per$0.00 -
Tial 46mm External Wastegate - Universal
Regular price $520.00Sale price $520.00 Regular priceUnit price per$0.00 -
Tial 60mm External Wastegate - Universal
Regular price $599.00Sale price $599.00 Regular priceUnit price per$0.00 -
SteamSpeed STX 63 Turbocharger 8cm WRX 2002-2007 / STI 2004-2020
Regular price $1,199.00Sale price $1,199.00 Regular priceUnit price per$0.00 -
Moroso Aluminum Oil Pan WRX/STI with EJ20 / EJ25 2002-2020
Regular price $760.02Sale price $760.02 Regular priceUnit price per$0.00 -
Moroso Oil Pickup Tube for OEM Pans WRX 2006-2014 / STI 2004-2020 Subaru Turbo Models
Regular price $94.80Sale price $94.80 Regular priceUnit price per$0.00 -
GrimmSpeed 08-14 WRX/ 08-21 STI Gates Stretch Belt Pulley Adapter | 095012
Regular price $32.00Sale price $32.00 Regular priceUnit price per$32.00
