Here you can see the difference between the factory exhaust system and the Banks Monster Exhaust system. The components are all manufactured from stainless steel and come ready to install. All bends were created using a mandrel to ensure a constant 4-inch diameter on the inside. The Monster muffler features a straight-through design that maintains the 4-inch-diameter flow path. An exclusive expansion chamber is present to help dissipate the annoying midrange exhaust drone of the 6.0L engine. The Banks installation center had our donor truck's new exhaust system installed in a little under three hours.