Unlike other competitor muffler designs, Flowmaster does not use a “straight-through” design for their mufflers. Straight-through designs use a packing material packed around a piece of perforated tubing to dampen sound as the exhaust flows through the muffler. This packing can deteriorate over time and become less effective in its sound reduction functionality. The internal tubing with this type of muffler usually is reduced in size as it enters the inlet of the muffler, which further reduces the sound as the exhaust flow is leaving the muffler. Unfortunately, this reduced size tubing tends to restrict the flow of exhaust gas as it moves through the muffler, reducing the performance potential.
Flowmaster mufflers utilize sound energy cancellation technology, eliminating the packing material other products use that can deteriorate over time. The interior case volume of a Flowmaster muffler is much higher than straight-pipe or straight-through muffler designs, for more efficient operation. Flowmaster mufflers feature a deflector that helps to reduce backpressure. In addition to sound energy cancellation technology, Flowmaster’s style of H-chamber designs also helps to control interior resonance in the cabin of your vehicle. Flowmaster mufflers are made in the USA and feature fully welded construction for extra strength and durability, even when used with high horsepower engines.