Stainless Steel Muffler. MAC guarantees Flowpath mufflers to outflow Dynomax #17734 or Flowmaster #42553!! Back pressure robs your car of power and economy. Reduced back pressure will cause immediate gains in both power and economy. If you modify your engine, for every 8-10% in power increase you will gain 30% more back pressure, which virtually chokes the motor. So any modification at the engine makes a free flowing exhaust and muffler system mandatory! There are three basic factors in noise control: Restriction, Absorbtion, and Reflection. Reflection, which is the most effective for power increase, is done with baffles and reflector plates with nothing to burn out. MAC Flow Path mufflers use reflection for maximum flow while still maintaining noise control. Instead of a single flow path, MAC Flow Path mufflers use two flow paths for twice the flow and reflection area, while remaining a true anti-reversion muffler. This is what makes Flow Path mufflers the Best Choice! Universal 9 x 3-3/4 x 13 dimensions.
Price reflects one (1) muffler.
**Photo depicts different MAC muffler, but same design. For illustration only