Designed to add a full flow oil system without machining the crankcase. Screws into the rear oil by-pass galley (spring & plunger must be removed) and provides the return route for oil from a full flow pump cover. Installs without engine removal. It has an 8AN, 37 º male fitting. This can be converted to a 1/2" barb with EMPI P/N: 9288 Fitting. Fits Dual By-Pass Case Only.