Upgrade or replace your Subaru WRX STI engine with this genuine OEM 2.5L EJ257 Type RA short block, designed for 2004-2021 STI models. This fully assembled short block offers a reliable foundation for your build or repair, delivering enhanced durability and performance. It’s the perfect solution for enthusiasts seeking a strong, ready-to-install engine core that supports increased power.

This short block comes directly from Subaru and includes stronger pistons and a forged crankshaft, matching the specs found in the 2018+ STI Type RA. Simply bolt on your cylinder heads and accessories, and it’s ready for installation. Ideal for replacing a failed 2.5L block or upgrading your engine’s strength, this short block ensures long-lasting performance.

Perfect for Subaru WRX STI owners who want OEM quality with performance upgrades, this short block is a practical choice. Note: no warranty if installed outside original vehicle applications. Shop Subaru engine parts confidently at Subimods and get your build moving forward today.