Auto-Jet Muffler provides Mandrel Bends, custom tube bending fabrication, muffler manufacturing, aluminized and 304 stainless steel tubing for the OEM, truck exhaust, school bus exhaust, and off-road markets, primarily for exhaust, air intake and coolant tubes since 1959.
Diesel Performance Systems, Inc.

All of our diesel exhaust systems are manufactured from the highest quality 15 and 16 gauge aluminized tubing and are are mandrel bent to ensure the least amount of restriction for the most in performance gain.

United Muffler Corp.
makes gas and diesel mufflers for school buses, construction equipment, industrial equipment, and custom mufflers other for vehicles needing heavy duty mufflers, truck exhaust systems, and exhaust accessories.