Autotech's goal was to build the best exhaust available anywhere. Autotech's SportTuned T304 Stainless Exhausts meet that goal. There are other stainless exhausts on the market, and while it seems new ones are popping up all over, AutoTech finds that the Autotech Systems are a cut above the rest. These SportTuned Exhaust systems include: HD 16 Gauge Aircraft Quality T304 Stainless Tubing, CNC Mandrel Bent Throughout for Maximum Airflow, Stainless Mufflers with Polished T304 Shells, All T304 Stainless Resonators, Heliarc (TIG) welded, Polished T304 Tip with Laser-Etched AST Logo, OEM Type Shell Clamps and Rubber Hangers and a Limited Lifetime Warranty.