Aftermarket fiberglass body parts do not fit the same as factory stamped steel body parts. They can be finished to show quality but fiberglass body parts are built closer to race car standards than to show car standards. Although fiberglass parts are easy to work with, they can require substantial work to conform to the varying early unibody Mustangs. Every car is slightly different. Within 30 days of receipt, you must check fit before sanding or painting your new fiberglass pieces. If fiberglass parts have been sanded or painted they can no longer be re-sold. For this reason, we will not warranty such parts and cannot be accepted for a return.