Get your semi truck Ready for the Road Ahead™ with reduced noise output, with the Power Products 9" x 20" Short Type 1 Muffler. This replacement component features an advanced design that dampens the sounds produced by exhaust gases by canceling out specific frequencies as they exit the pipes of a vehicle. Engineered with special components to enhance flow control and backpressure regulation. FleetPride is your First Click in Heavy Duty®.