Well, you guys could be right but these pieces of flat metal, 1/4" x 3", are mounted to the outside of the frame rails and have been burned of even with the leaf springs. That location does nothing for getting exhaust pipes out the GT exhaust holes. I' ve been around this car since it was delivered here in San Diego and am pretty familiar with its history. I always just thought these were used for transport to LA and were burned off after delivery, or added for the truck ride to SD. Just something thats always been on the car and never really knew why. Thanks. Brian