Flowmaster's American Thunder Crossmember-back exhaust system for the 1962-1967 Chevrolet Chevy II/Nova is perfect for the person looking for an aggressive sound level inside and outside of the car, with all of the performance benefits that you would expect from Flowmaster. This bolt-on DOS (Dual Out Side) system features stainless steel Super 44 Series mufflers and dual 2.50” 409S Stainless Steel tailpipes and a welded H-Pipe. Like all Flowmaster systems, the pipes are all mandrel bent to reduce any restrictions and maximize performance. The exhaust system is covered by Flowmaster's Lifetime Limited Warranty. Designed for an easy fit, this system includes all necessary parts and hardware for installation.