2015 2016 2017 2018 2019 2020 2021 Subaru WRX STI 2.5L DOHC Turbo AVCS Engine JDM EJ257 V10

Experience the pinnacle of Subaru performance with this low-mileage JDM 2015-2021 Subaru WRX STI EJ257 2.5L Turbo Engine. This "Version 10" (V10) spec EJ257 is the refined, high-output heart of the final-generation STI, featuring advanced Dual AVCS (Active Valve Control System) for optimized torque and high-RPM power. Sourced directly from pristine Japanese donor vehicles, these units are meticulously inspected for internal health, ensuring they meet the high standards required for US-spec STI restorations and performance builds. Whether you are replacing a spun-bearing block or upgrading your WRX, this EJ257 delivers the legendary flat-four rumble and turbo-boosted reliability that defines the STI legacy.

Vehicle Specifications

• Year Range: 2015, 2016, 2017, 2018, 2019, 2020, 2021

• Make & Model: Subaru WRX STI (VA Chassis)

• Engine Code: EJ257 (2.5L DOHC 16-Valve Turbocharged Flat-4)

• Performance Tech: Dual AVCS (Intake & Exhaust Variable Valve Timing)

• Configuration: Horizontally Opposed "Boxer" 4-Cylinder

• Origin: Japan (Genuine OEM Japanese Domestic Market Performance Import)

• Condition: Premium Used Performance Import (Compression/leak-down verified, timing components inspected, and certified low-mileage donor)

Vehicle Fitments

• Direct US-Spec Replacement: 2015-2021 Subaru WRX STI (VA Chassis).

• Compatibility: Designed specifically for the EJ257-equipped VA platform.

• Fitment Note: This is a drop-in replacement for existing EJ257 engines. If retrofitting into older Subaru chassis, please consult a performance shop regarding the required Dual-AVCS ECU management and wiring harness integration.