The Flowmaster Super 44 is the most aggressive, deepest-sounding 2-chamber street muffler we've ever made. Designed with advanced Delta Flow Technology, it delivers a rich, powerful tone and top-tier performance. Choose from 409SS stainless steel with a lifetime warranty or durable 16-gauge aluminized steel with a 3-year warranty. Fully MIG-welded for strength, the Super 44 is the ultimate muffler for serious street performance.