Medium & Heavy Duty Mufflers

Mega-Flow® Mufflers

Walker® Commercial Vehicle mufflers are made in the USA and provide an economical replacement for OE components

Walker® offers a complete line-up of commercial vehicle mufflers with dimensional and backpressure data by SKU. Reference your new Master Catalog for detailed information on each muffler.

Specifically designed for Class 7 and 8 vehicles, Mega-Flow® combines Walker® quality and engineering with cutting-edge technology to deliver unparalleled performance (based on published competitive data); as much as 30% backpressure reduction without sacrificing acoustics. That means increased fuel efficiency and driver comfort.

*Tests performed on a Peterbilt® Class 8 truck with a Caterpillar® C-12 engine. Measured on vehicles equipped with a Mega-Flow® Muffler and identical vehicles equipped with OE mufflers over a 6-month period for a total of 312,961 miles.

Key Features of the Mega-Flow® Muffler

  1. Reduced backpressure without sacrificing acoustics!  The Mega-Flow® muffler combines an open-style design with OCF roving to produce a muffler that improves fuel efficiency without impact on acoustics, two key needs of the fleet. Other mufflers currently available address one at the expense of the other.
  2. Backed By the best guarantee in the industry!  Only Mega-Flow® mufflers are backed by a Limited Lifetime Warranty plus an exclusive 90-day Safe & Sound Guarantee.
  3. Remetallized seams provide corrosion resistance!  The Mega-Flow® muffler has remetallized welds that provide greater corrosion resistance. This remetallization process is unique to Walker® and ensures that your muffler will last longer and look better.
  4. The embossed shell distinguishes the Mega-Flow® muffler from others!  The Mega-Flow® muffler looks as good as it performs. With its embossed logo on the body, you can tell you're getting something special, and so can everyone else.

Read about our Warranty and 90-Day Free Ride Offer!