These formed polished stainless fuel rail covers are made from Type 304 stainless. Each cover follows the pattern of the original plastic fuel rail covers. They attach with supplied Velcro. Each fuel rail cover has vents in the back area to match up with the intake stainless cover. A protective molding lines the slot to keep the fuel line from coming in contact with the stainless cover. No drilling is required. (Note the photo above shows the fuel rail covers on a 2002 Corvette.) The 1997 and 1998 require a different fuel rail cover because of the fuel line arrangement and have been discontinued. These covers also fit all Z06 models as well.