Flowmaster introduces their new Super 40 Series muffler intended for late model pickup trucks with 3.5in OEM tubing size. This muffler features a 3.5in offset inlet/offset outlet configuration with larger 4.0in internals for maximum flow capabilities with the larger engine sizes found in today’s trucks. Being a Super 40 design, this muffler will deliver a deep, aggressive sound outside and inside the vehicle. Fully welded with 409S Stainless Steel, these mufflers are covered by Flowmaster’s Lifetime Limited Warranty and are made in the USA.