Original replacement, GT dual exhaust system for 1965 through 1966 289 engine with Standard Exhaust Manifolds. Will fit also 1967/1968 cars with 289 and 302 engines but is not original in appearance. This kit consists of the "H" pipe, the intermediate pipes, mufflers and exhaust tail pipes with GT Resonators. All clamps and hangers are sold separately. Can be used with GT Exhaust Tips, After Market Tips or Turn Downs. The tube diameter is 2". Note: Not recommended for Convertibles due to very tight clearances in Transmission Tunnel at Convertible Seat Reinforcement Pans and Reinforcement Plate. Modifications to fit Convertibles will most likely be required by an Exhaust Shop. See Concours Exhaust Systems for a trouble free installation.