Flowmaster says that it’s new American Thunder Header-back True-dual stainless-steel exhaust system for 1968-1972 GM A-body Chevelle, Cutlass, GTO and Skylark delivers an aggressive sound with the performance to back up what that great sound implies.

Official Release:

While musclecars should always retain that great musclecar sound, today’s owners are looking for something more and demand not only great sound from their custom modifications, but the performance to back up what that great sound implies. Flowmaster’s new American Thunder Header-back True-dual system for 1968-1972 GM A-body Chevelle, Cutlass, GTO and Skylark is the perfect way to achieve enhanced power and torque with a direct-fit component. The system is a true-dual design that runs from the transmission cross member, through a welded H-Pipe assembly into 2.50″ Super 40 mufflers and then through tailpipes that exit straight out the back under the bumper. Constructed of 409S stainless-steel for maximum durability and covered by our

• 10-year warranty, the system also includes all necessary hardware and hangers for installation. The system generally delivers an aggressive sound level both inside and outside of the vehicle.
• CNC mandrel bent tubing for ultimate fit and performance
• Features dual Super 40 mufflers for a deep, aggressive tone
• 409S stainless-steel construction for maximum durability
• Includes all necessary parts, hardware and instructions for installation
• 10-Year Warranty
• Made in USA