The Super 50 (formerly called 50 SUV) incorporates an increased case size with the innovative technology found in the 50 Series Delta Flow mufflers. The Super 50 Series’ large tuning chamber allows for optimum exhaust flow, increased mileage and reduced interior resonance. This muffler is especially suited for trucks and SUVs as well as full-sized, high performance street cars looking to reduce interior resonance and tone levels for everyday driving.