NOS 1984-1996 C4 Corvette Front Bumper Impact Bar GM# 14046663 Shim OEM SEALED. This metallic aluminum bumper is a direct replacement with a casting number of 14046663 and a superseded part number of the same value. It fits on the front of the vehicle and comes with a California Prop 65 warning. The bumper is new and comes in a sealed package, avoiding any modifications. The manufacturer part number is 14046663, and it is an OEM product from General Motors.