The measurements for the two opening are: 8.5" wide 3-1/2" high and 1" between the two openings.

This center valance requires the stock Z28 Tips, or you can purchase them from us. The part number is 01021365 for a set. Your stock or aftermarket exhaust will need to be modified by a proffesional muffler shop in order to make the rear center valance fit and look correct.