Flowmaster vs. "straight-through" muffler designs

 "Straight-through" muffler designs utilize a packing material wrapped around a piece of perforated tubing to absorb sound as its traveling through the muffler. This internal tubing is generally reduced as it enters the inlet of the muffler to help achieve a further reduction of sound as its exiting the muffler, smaller hole, less sound. At the same time this creates a further restriction for hot exhaust gases traveling through the mufflers.

Since Flowmaster mufflers use sound energy cancellation technology, you don't have to worry about "packing material" deteriorating and getting louder after as little as a few months.

The interior case volume of the inside of a Flowmaster muffler is far superior to that of a "straight-pipe" or "straight-through" muffler design. Imagine filling a "straight-pipe" or "straight-through" muffler with water vs. filling a Flowmaster muffler with water. Which one do think would hold substantially more volume?

The deflector in a Flowmaster muffler acts as a one way check valve eliminating reversion back to the engine and creates a low pressure area to help scavenge the exhaust.

Flowmasters unique style of H-Chamber designs help control interior resonance inside the cab area of your vehicles. "Straight-through" muffler designs cannot.

Flowmasters use fully welded construction for added strength and durability to last even when installed on high horsepower engines.

Flowmaster mufflers are made in the U.S.A.