Replaces a worn out or old rear oil passage plug that could be allowing dirty engine oil to bypass the oil filter. Machined out of billet aluminum, compared to the OEM GM Part No.12573460 is constructed out of plastic. Improved design with a secondary O-ring that’s function is to seal dirty oil from flowing to the engine bearings. The shaft diameter of the Moroso passage plug, “Dogbone” or “Barbell” is smaller than the OEM piece, to minimize any flow restriction. Supplied O-rings are constructed out of Viton to withstand all types of engine oils, compression cycles and have a high temperature rating. Can be easily removed from the engine block once installed with its 4mm threaded hole.
- Billet Aluminum
- Sold individually.