Performance Intake Manifold for Subaru EJ20/EJ25

The Cosworth High Volume Inlet Manifold is engineered as a direct replacement for stock intake plenums on Subaru Impreza GT, WRX, and STI models, as well as Forester XT variants equipped with EJ20 and EJ25 engines. This performance upgrade is designed to increase airflow and enhance engine performance, with claims of up to a 7% increase when used with the same engine setup. This manifold boasts a larger air reservoir and a less restrictive airflow path, making it suitable for cars at various stages of tune. The unit is compatible with models fitted with electronic throttle control, such as the EJ257 STI engines, but is not designed for use with cable-actuated throttles. Additional specifications include a maximum pressure rating of 120 psi and a maximum temperature of 392°F (200°C). It is equipped with four 1/8" BSPT vacuum ports and two 1/4" BSPT vacuum ports. The manifold is generally recommended for Subaru Impreza models from 1994-2013 and Forester XT models from 1997-2014, specifically for EJ20 and EJ25 engines.