Increase Your Options. Our billet rocker cover breather plates provide perfect flexibility when adapting your breather system for use with an oil catch tank kit. The EJ20 engine features three main breather vents for the engine, one central breather (exits from the engine block) and two smaller breather ports which are located on the top of each rocker cover casting. Our new breather plates allow the use of AN6 and AN8 fittings to be installed, which in turn offers multiple options on braided and rubber oil lines (normally not possible).
