This American Thunder system is specially designed for 1967-1968 Camaro and Firebirds with V8 engines for an aggressive to moderate sound. This is a complete Crossmember-Back dual exhaust system. Designed for an easy fit, these systems include all necessary parts, hardware, and instructions. The 2.50-inch stainless steel pipes exit straight out under the rear bumper and are finished off with 2.50-inch angle-cut brushed stainless steel tips. Fits convertibles by spacing down the factory convertible x-body brace by approximately .375-inch.