Largest and Quietest Muffler Available

Flowmaster's 50 Series Big Block Mufflers are the largest and quietest mufflers from Flowmaster, made for tow vehicles, full-size trucks, large SUV’s and RV’s/Motor homes. 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. Significant improvements in mileage, torque, and horsepower as well as decreased engine heat and wear makes this muffler a must.