You no longer have to sacrifice strength for a quieter working environment with Corsa Performance's new Duramax Diesel exhaust system specifically engineered for the 6.6 liter GMC Duramax Diesel truck. The 4-inch diameter 304L stainless steel exhaust utilizes CORSA's patented Reflective Sound Cancellation RSC technology, which enhances the vehicle's sound while eliminating the distractive cabin resonance found with other performance diesel exhaust systems.