Subaru EJ Engine (2008–2021 STI) Performance Packages

Unlock the full potential of your 2008–2021 Subaru WRX STI with our dyno-tested EJ257 performance packages. Designed for maximum horsepower, reliability, and boost control, these packages range from bolt-on upgrades to fully built high-horsepower setups. Whether you’re looking for improved throttle response, increased turbo efficiency, or track-ready power, we’ve got you covered

EJ257 Performance Package 350HP

EJ257 Performance Package 450HP

EJ257 Performance Package 550HP