Maximize your flow, power, and efficiency with the Flowmaster 70 Series Big Block II Muffler. The Flowmaster Series 70 is built with a massive inner chamber to handle the displacement of larger towing engines. It also lets out a throaty tone without overpowering interior resonance.

The Flowmaster 70 Series Muffler is built from either bright corrosion-resistant Stainless Steel or 16-gauge aluminized steel with precise mig welds for superior durability. The 70 Series features Flowmaster's exclusive Delta Flow technology, with precisely-placed deflectors that virtually eliminate interior resonance while aiding exhaust scavenging for maximized power and torque. The exterior sound is throaty and mild, and bold without being overpowering.

Flowmaster backs your 70 Series Big Block II Muffler with a 3 Year Warranty.