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 $7.25 off
In StockRadium Engineering 4.0Bar Bosch Fuel Pressure Regulator - Universal
Only 6 leftRegular price $137.70Sale price $137.70 Regular priceUnit price per$144.95 -
Up to $3.50 off
In StockRadium Engineering Fuel Filter 1pc Clamp 60mm Heat Exchanger - Universal
Regular price $66.45Sale price $66.45 Regular priceUnit price per$69.95 -
Up to $6 offRadium Engineering Fuel Rail In Line Pulse Damper 10AN - Universal
Regular price $113.95Sale price $113.95 Regular priceUnit price per$119.95 -
Up to $6 offRadium Engineering Fuel Rail In Line Pulse Damper 8AN - Universal
Regular price $113.95Sale price $113.95 Regular priceUnit price per$119.95 -
Up to $6.50 offRadium Engineering Fuel Rail In Line Extra Range Pulse Damper 6AN - Universal
Regular price $123.45Sale price $123.45 Regular priceUnit price per$129.95 -
Up to $6.50 offRadium Engineering Fuel Rail In Line Extra Range Pulse Damper 8AN - Universal
Regular price $123.45Sale price $123.45 Regular priceUnit price per$129.95 -
Process West 02-14 WRX / 07-21 STI Billet Fuel Rails Black | PRW-PWFR01B
Regular price $366.48Sale price $366.48 Regular priceUnit price per$366.48 -
Process West 02-14 WRX / 07-21 STI Fuel Rails | PWFR01
Regular price $342.00Sale price $342.00 Regular priceUnit price per$342.00 -
Grams Performance 1000cc Fuel Injectors 02-14 WRX / 07-19 STI / 07-11 Legacy GT / 04-13 Forester XT / Outback XT 2007-2009
Regular price $439.99Sale price $439.99 Regular priceUnit price per$0.00 -
Grams Performance 1600cc Fuel Injectors 02-14 WRX / 07-19 STI / 07-11 Legacy GT / 04-13 Forester XT / Outback XT 2007-2009
Regular price $839.99Sale price $839.99 Regular priceUnit price per$0.00 -
Grams Performance 2200cc Fuel Injectors 02-14 WRX / 07-19 STI / 07-11 Legacy GT / 04-13 Forester XT / Outback XT 2007-2009
Regular price $799.99Sale price $799.99 Regular priceUnit price per$0.00 -
Grams Performance 1150cc Fuel Injectors 02-14 WRX / 07-19 STI / 07-11 Legacy GT / 04-13 Forester XT / Outback XT 2007-2009
Regular price $539.99Sale price $539.99 Regular priceUnit price per$0.00 -
Grams Performance 550cc Fuel Injectors 02-14 WRX / 07-19 STI / 07-11 Legacy GT / 04-13 Forester XT / Outback XT 2007-2009
Regular price $349.99Sale price $349.99 Regular priceUnit price per$0.00 -
Grams Performance 750cc Fuel Injectors 02-14 WRX / 07-19 STI / 07-11 Legacy GT / 04-13 Forester XT / Outback XT 2007-2009
Regular price $439.99Sale price $439.99 Regular priceUnit price per$0.00 -
In StockAeromotive Fuel Pressure Regulator | 13301 - Universal
Only 12 leftRegular price $243.23Sale price $243.23 Regular priceUnit price per$243.23 -
In StockAeromotive Ultra High Flow Fuel Pressure Regulator | 13113 - Universal
Only 8 leftRegular price $439.20Sale price $439.20 Regular priceUnit price per$439.20
