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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In StockWalbro GSS342G3 Intank Fuel Pump 255LPH High Pressure - Universal
Regular price $76.00Sale price $76.00 Regular priceUnit price per$76.00 -
Walbro GSS340G3 Intank Fuel Pump 255LPH High Pressure - Universal
Regular price $55.99Sale price $55.99 Regular priceUnit price per$0.00 -
Up to $19.88 offTurbosmart FPR-800 Adjustable Fuel Pressure Regulator - Universal
Regular price From $178.95Sale price From $178.95 Regular priceUnit price per$184.49 -
Up to $4.86 offTurbosmart Fuel Pressure Regulator 800 1/8 NPT- Black - Universal
Regular price $157.13Sale price $157.13 Regular priceUnit price per$161.99 -
In StockInjector Dymanics Fuel Injector PnP Adapter USCAR to EV1 - Universal
Regular price $11.55Sale price $11.55 Regular priceUnit price per$11.55 -
Injector Dynamics ID1050X Injectors & Deatschewerks 65C Fuel Pump Combo 07-09 Legacy GT / 08-14 WRX / 08-19 STI
Regular price $717.00Sale price $717.00 Regular priceUnit price per$0.00 -
In StockInjector Dynamics Denso EV1 PnP Injector Adapter - Universal
Only 16 leftRegular price $17.33Sale price $17.33 Regular priceUnit price per$17.33 -
In StockInjector Dynamics Denso OBD2 PnP Injector Adapter - Universal
Only 5 leftRegular price $17.33Sale price $17.33 Regular priceUnit price per$17.33 -
Injector Dynamics 2000cc Top Feed Injectors + Adapters + Deatschwerks 300C Fuel Pump WRX 2008-2014 / STI 2008-2019
Regular price $1,197.00Sale price $1,197.00 Regular priceUnit price per$0.00 -
Injector Dynamics 1700cc Top Feed Injectors + Adapters + Deatschwerks 300C Fuel Pump WRX 2008-2014 / STI 2008-2019
Regular price $1,397.00Sale price $1,397.00 Regular priceUnit price per$0.00 -
Injector Dynamics 1340cc Top Feed Injectors + Adapters + Deatschwerks 300C Fuel Pump WRX 2008-2014 / STI 2008-2019
Regular price $1,137.00Sale price $1,137.00 Regular priceUnit price per$0.00 -
Injector Dynamics Top Feed 2200cc Fuel Injectors WRX 2002-2014 / STI 2007-2019
Regular price $960.00Sale price $960.00 Regular priceUnit price per$0.00 -
In StockInjector Dynamics ID-F750 Performance Fuel Filter - Universal
Only 13 leftRegular price $346.50Sale price $346.50 Regular priceUnit price per$346.50 -
Up to $23 off
In StockAEM High Cap Universal Adjustable Fuel Pressure Regulator | 25-305BK
Only 4 leftRegular price $177.95Sale price $177.95 Regular priceUnit price per$200.95 -
Up to $21 off
In StockAEM Universal Adjustable Fuel Pressure Regulator | 25-302BK
Only 7 leftRegular price $166.95Sale price $166.95 Regular priceUnit price per$187.95 -
Up to $20 off
In StockAEM Universal -10AN High Volume Fuel Filter | 25-201BK
Only 3 leftRegular price $155.95Sale price $155.95 Regular priceUnit price per$175.95
