Superior quality "shorty" headers. They are nickle plated with 1 5/8th inch tubes and laser cut 3/8th inch thick flanges. For 1964 through 1970 Mustangs. NOTE: 64/65 cars will require either 66/70 motor mounts and brackets or 1/4 inch spacers on stock mounts for proper clearance. For 67/68 they will fit cars with automatic trans only.