Flowmaster Muffler Heat Shield - 51022

The 70 Series Big Block Muffler uses a longer case for increased volume and added sound reduction that will still fit many applications where the wider 50 Series Big Block muffler will not fit.. Flowmaster 70 Series Big Block II Muffler - 53071 The 70 Series mufflers are perfect for high performance street cars, most trucks, SUVs, RVs and tow vehicles that require quiet operation with improved sound.The 70 Series Big Block utilizes Flowmasters patented Delta Flow Technology for maximum efficiency and minimum interior resonance.

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.

Flowmaster 50 Series SUV Muffler - 53055 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. The Super 50 (formerly called 50 SUV) incorporates an increased case size with the innovative technology found in the 50 Series Delta Flow mufflers.

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More than just compatible with big cubic inch engine applications, the 50 Series Big Block incorporates a very large Resonance Tuning Chamber to almost completely reduce interior sound in large cab vehicles and enough case volume to handle engines under heavy loads - perfect for tow vehicles. Flowmaster 50 Series Big Block Muffler - 527504 Significant improvements in mileage, torque, and horsepower are to be expected from this muffler, as well as decreased engine heat and wear.