Round Style 1 Muffler, 4.02" Inlet/Outlet, 9.01" x 44.44" Body

The Donaldson M090544 is a Round Style 1 muffler engineered for performance and sound reduction. With an inlet and outlet diameter of 4.02 inches and a substantial body diameter of 9.01 inches, this muffler is built for robust air and exhaust flow. This muffler boasts a body length of 44.44 inches and an overall length of 51.00 inches, providing ample internal volume for sound dampening. Its rated flow capacity is 1158 cfm at low range and 2005.87 CFM at high range, with a back pressure of 76 MM HG in the high-pressure range, indicating efficient exhaust gas management. User reviews suggest this muffler significantly reduces noise levels both inside and outside the vehicle, without causing a loss in power. One user noted it provides a quieter experience with no drone, good tone, and no exhaust brake noise. It is described as a direct replacement for various applications, with one mention of it being used in a 2014 6.7L engine application.