Quiet Operation, Maximum Efficiency

Flowmaster's 70 Series Big Block II Mufflers feature a longer case for increased volume and added sound reduction by utilizing Flowmaster’s patented Delta Flow Technology. The 70 Series offers maximum efficiency and minimum interior resonance, best suited for street cars, trucks, SUV’s, RVs and tow vehicles that require quiet operation with minimum improved sound. These mufflers will still fit many applications where the wider 50 Series Big Block muffler won’t.