MST. Silver. Made in the USA. This MST item is CNC machined from 6061-T6 Billet Aluminum and comes with new gaskets, acorn nuts, washers and a drain plug. Everything you need to complete your professional installation! This product is designed to replace your stamped, steel version and maintain that great stock look. Flat, precision machined and NO Leaks! It is the perfect complement to your engine. ** NOTE : DRAIN PLUG IS NOT THREADED STOCK SIZE, IT IS 1/2" 13X1/2 **