2015 2016 2017 2018 2019 2020 2021 Subaru WRX STI 2.5L AVCS Turbo Engine JDM EJ257 V10 Long Block
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Mileage:38000
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Warranty:30
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Available In Stock:1 Items
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90 Days Warranty
90-day warranty for non-performance engines, 30 days for performance. Covers internal parts, excludes labor. Read more
Product Information
2015 2016 2017 2018 2019 2020 2021 Subaru WRX STI 2.5L AVCS Turbo Engine JDM EJ257 V10 Long Block
Upgrade or restore your vehicle with this genuine Japanese Domestic Market (JDM) low-mileage Subaru EJ257 2.5L Turbo AVCS V10 Engine. Sourced directly from running vehicles in Japan, this high-performance DOHC boxer engine features Subaru's legendary horizontally opposed layout, delivering robust low-end torque and exceptional tuning headroom. This long-block engine assembly has been compression tested, cleaned, and thoroughly inspected to serve as the ultimate stock OEM replacement or a strong foundation for your next high-horsepower build.
| Specification | Detail |
| Engine Code | EJ257 (JDM Version 10) |
| Displacement | 2.5 Liters (2457 cc) |
| Engine Type | Horizontally Opposed 4-Cylinder (Boxer) |
| Valvetrain | DOHC 16-Valve |
| Cam Timing | AVCS (Active Valve Control System) |
| Aspiration | Turbocharged / Intercooled |
| Fuel Delivery | Multi-Point Sequential Fuel Injection |
| Average Mileage | 45,000–65,000 miles |
Vehicle Fitments
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2015 Subaru WRX STI (Base / Limited)
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2016 Subaru WRX STI (Base / Limited / Series.HyperBlue)
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2017 Subaru WRX STI (Base / Limited)
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2018 Subaru WRX STI (Base / Limited / Type RA)
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2019 Subaru WRX STI (Base / Limited / S209)
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2020 Subaru WRX STI (Base / Limited / Series.White)
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2021 Subaru WRX STI (Base / Limited)
Included Parts
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Complete Engine Long Block Assembly
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Factory Cylinder Heads
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Valve Covers and Internal Camshafts
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Timing Belt Assembly & Water Pump (Inspected for transport)
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Factory Intake Manifold (As pictured)
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Fuel Rail and Injectors (As pictured)
Installation Notes
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Long Block Switchover: This is a JDM imported motor. To ensure an exact plug-and-play installation for US-market vehicles, you may need to swap your original intake manifold, wiring harness, sensors, and exhaust accessories.
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Pre-Install Maintenance: We highly recommend replacing the timing belt, water pump, thermostat, rear main seal, and spark plugs prior to dropping the engine in.
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Fluids & Priming: Fresh high-quality synthetic oil and OEM Subaru coolant must be used. Ensure the oiling system is fully primed before starting the engine for the first time.
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Professional Install: Professional installation by a certified Subaru technician or specialized performance shop is required to maintain warranty eligibility.