Shortblock 10103AC510 for Subaru W20C STI

The W20C STI Shortblock (OEM 10103AC510) is a genuine Subaru engine base assembly designed for high-performance STI applications. It includes factory-assembled engine components such as the crankcase, crankshaft, connecting rods and pistons, ensuring optimal durability, precision and reliability. Manufactured to Subaru’s performance standards, it provides a strong foundation for both OEM rebuilds and high-power engine projects.

Manufacturer: Subaru
OEM Part Number: 10103AC510