Upgrade your performance ride with the Flowmaster Super 40 Series Muffler, engineered with the brands race-proven Delta Flow® technology. This muffler delivers deep, aggressive tone and excellent performance on high-horsepower vehicles thanks to its oversized case profile and advanced deflector design. Built from 16-gauge aluminized steel (or available in 409 SS on select models) and fully MIG welded for maximum durability. With the Super 40 you get the inspiring sound of the original 40 Series combined with reduced interior drone and smoother highway cruising perfect for street/strip builds, forced-induction setups, and muscle cars where tone and comfort matter. Add this muffler to your build for an unmistakable aggressive sound, strong performance, and premium construction you can trust.