Subaru Impreza WRX STI 2008–2021 2.5L Turbo Engine – JDM Low Mileage EJ257 Motor – Compression Tested – 30 Day Warranty

If your STI is down due to rod knock, ringland failure, spun bearing, or excessive oil consumption, J-Spec Auto Sports has the solution. We are offering a JDM low mileage Subaru EJ257 2.5L turbo engine, professionally compression tested and backed by a 30-day startup warranty.

This is the legendary EJ257 turbocharged boxer engine used in the 2008–2021 Subaru WRX STI platform. Known for its strong block design and massive tuning potential, the EJ257 remains one of Subaru’s most respected performance engines.

Whether you’re restoring a stock STI or building a performance project, this engine provides the proper OEM foundation.

Engine Specifications

• Engine Code: EJ257

• Displacement: 2.5L Turbocharged

• Configuration: DOHC Flat-4 Boxer

• AVCS: Dual AVCS

• Fuel Type: Gasoline

• Turbocharged: Yes

• Condition: Used JDM – Low Mileage

• Compression Tested: Yes

• Warranty: 30-Day Startup Warranty

Each engine is inspected and compression tested before sale to ensure even cylinder readings and mechanical health.

Compatible Vehicles

Direct Fit For:

• 2008 Subaru Impreza WRX STI

• 2009 Subaru Impreza WRX STI

• 2010 Subaru Impreza WRX STI

• 2011 Subaru Impreza WRX STI

• 2012 Subaru Impreza WRX STI

• 2013 Subaru Impreza WRX STI

• 2014 Subaru Impreza WRX STI

• 2015 Subaru WRX STI

• 2016 Subaru WRX STI

• 2017 Subaru WRX STI

• 2018 Subaru WRX STI

• 2019 Subaru WRX STI

• 2020 Subaru WRX STI

• 2021 Subaru WRX STI

Chassis Platforms:

• GRB (Hatchback)

• GVF (Sedan)

• VA STI

Always verify fitment prior to purchase, especially for VA chassis models due to minor accessory differences.

Why the EJ257 Is So Popular

The EJ257 has powered Subaru’s flagship STI models for over a decade. It delivers:

✔ Strong factory turbo performance
✔ Forged crankshaft design
✔ Excellent aftermarket support
✔ Proven durability when maintained
✔ Huge tuning potential

This engine is capable of handling upgraded turbos, fuel systems, and bolt-on modifications with proper tuning.

Compression Tested for Confidence

Many sellers offer untested engines. At J-Spec Auto Sports, every EJ257 is:

• Compression tested

• Visually inspected

• Checked for internal damage

• Evaluated for consistent cylinder readings

This ensures your engine arrives in reliable startup condition.

30-Day Startup Warranty

Your purchase includes a 30-day startup warranty, giving you peace of mind during installation.

We stand behind our engines and understand the importance of reliability in turbo Subaru platforms.

Ideal For:

• Blown engine replacement

• Ringland failure repair

• Rod knock replacement

• High-mileage STI refresh

• Stock rebuild foundation

• Performance builds

Whether you’re keeping it stock or planning future upgrades, the EJ257 remains the correct OEM turbo platform.

What’s Included

Engine is sold as a long block assembly. Depending on stock availability, it may include:

• Intake manifold

• Turbocharger

• Fuel rails

• Coil packs

• Sensors

Accessories may vary. Contact J-Spec Auto Sports for exact details on the current engine in stock.

Why Buy From J-Spec Auto Sports?

J-Spec Auto Sports specializes in:

• JDM Subaru turbo engines

• STI 6-speed transmissions

• Complete front clips

• EJ-series motors

• Rare Subaru performance parts

We focus on properly sourced, inspected engines — not unknown-condition units.

Our reputation is built on transparency, reliability, and Subaru expertise.

Nationwide Freight Shipping Available

All engines are palletized and securely shipped via freight carrier throughout the United States.

Local pickup may also be available.

See more EJ255 STI motors:  https://jspecauto.com/product-category/engines/?_product_brand=subaru&_engine_sub_category=ej255-ej257-2-5l-engines-for-wrx-and-wrx-sti&_available=1