Complete aluminized exhaust system for high performance K-code 289 cu.in. Mustangs. Diameter is 2 inches. This kit fits factory Hi-Po exhaust manifolds only. Available with or without resonators. Brackets and hangers not included. This exhaust system will fit any 289 using 289 HiPo manifolds and a GT style rear valance. 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.