This aftermarket tip is very similar to the 70 Mach 1 design with the exception it does not have the Concours Rolled tip. Will fit the rear valance exhaust cut-out on all 67-70 Mustangs. Will fit up to 2 1/4" exhaust pipes. For Concours Correct 70 Mach 1 version order part number D0ZZ-5255-A