The Flowmaster 50 Series Heavy Duty muffler was designed for full-size trucks with both gas and diesel engines. It features a 4" internal design to offer increased exhaust flow reducing restrictions and back pressure. This increased flow leads to significant gains in horsepower, torque, and fuel mileage.
The 50 Series HD mufflers is Flowmaster's most aggressive "50 Series" muffler and offers a deep, powerful that offers an incredible sound. It offers a performance sounding tone and is ideal for stock or modified trucks. The Flowmaster 50 Series Heavy Duty mufflers are constructed of stainless steel and feature an 18"Lx10"Wx5"H case with an overall tip to tip length of 24". The HD muffler is available for 3", 3.5", and 4" exhaust systems.
Flowmaster is offering a lifetime limited warranty on their stainless steel 50 Series HD Mufflers.
Flowmaster mufflers are designed to work with new or existing exhaust systems. They offer slip on installation and can be welded or clamped into place. Due to the use of heavier materials, Flowmaster recommends spot welding the joints when using clamps. On some applications it will be necessary to cut or splice when adding Flowmaster mufflers to an existing exhaust system.