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 $32.75 offGarrett GTX3576R Gen II Reverse Turbine Hsg Kit O/V V-Band / V-Band 0.61 A/R | Ni-Resist
Regular price $491.25Sale price $491.25 Regular priceUnit price per$524.00 -
Carrillo Pro-Super A Beam Connecting Rod WRX/STI EJ20/EJ257 2002-2020 | Single Rod
Regular price $311.85Sale price $311.85 Regular priceUnit price per$0.00 -
Mahle Pistons PowerPak 99.5mm Bore 8.5:1 Comp WRX/STI EJ25 2004-2019
Regular price $638.76Sale price $638.76 Regular priceUnit price per$0.00 -
Up to $32.75 offGarrett GTX3576R Gen II Reverse Turbine Hsg Kit O/V V-Band / V-Band 1.01 A/R | Ni-Resist
Regular price $491.25Sale price $491.25 Regular priceUnit price per$524.00 -
Up to $32.75 offGarrett GTX3071R Gen II Reverse Turbine Hsg Kit O/V V-Band / V-Band .83 A/R | Ni-Resist
Regular price $491.25Sale price $491.25 Regular priceUnit price per$524.00 -
Up to $32.75 offGarrett GTX3071R Gen II Reverse Turbine Hsg Kit O/V V-Band / V-Band 0.61 A/R | Ni-Resist
Regular price $491.25Sale price $491.25 Regular priceUnit price per$524.00 -
Up to $99.35 offGarrett GTX2967R Super Core 58 Trim Comp 90 Trim Turbine CHRA 836013-0003
Regular price $1,490.19Sale price $1,490.19 Regular priceUnit price per$1,589.54 -
Up to $100.83 offGarrett GTX2967R Super Core 55 Trim Comp 84 Trim Turbine CHRA 836013-0001
Regular price $1,512.50Sale price $1,512.50 Regular priceUnit price per$1,613.33 -
Up to $99.35 offGarrett GTX2967R Super Core 58 Trim Comp 84 Trim Turbine CHRA 836013-0002
Regular price $1,490.19Sale price $1,490.19 Regular priceUnit price per$1,589.54 -
Aeromotive 13201 Regulator Kit Single Carb - Universal
Regular price $393.66Sale price $393.66 Regular priceUnit price per$393.66 -
In StockDeatschwerks USCAR to Minitimer/Jetronic/EV1 Double-sided Connector Adapter - Universal
Regular price $6.00Sale price $6.00 Regular priceUnit price per$6.00 -
CP Piston & Ring Set Bore 99.5mm Size STD Compression Ratio 9.0 WRX/STI Subaru EJ257 2004-2019
Regular price $679.00Sale price $679.00 Regular priceUnit price per$0.00 -
CP 9310 Steel Non-Chamfered Wrist Pin - Universal
Regular price $28.50Sale price $28.50 Regular priceUnit price per$0.00 -
In StockBrian Crower Single Groove Valve Stem Keepers/Locks | fits BC2160 WRX/STI EJ205/EJ257 2002-2019
Only 5 leftRegular price $109.00Sale price $109.00 Regular priceUnit price per$109.00 -
Brian Crower Titanium Retainers Subaru EJ205-WRX / EJ257-STI
Regular price $174.33Sale price $174.33 Regular priceUnit price per$0.00 -
Up to $29.20 off
In StockBLOX Racing Oil Filter Block Adapter / Oil Pressure / Oil Temperature Universal
Only 4 leftRegular price $116.80Sale price $116.80 Regular priceUnit price per$146.00
