This cover is made from copper, then chrome plated so it will never pit or tarnish. It simply slips over the current cap and looks factory since it's shaped like the original black plastic cover.
Mustang Fitment: 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004