Patent ID: 7174992

Claim:
A muffler comprising a main body extending axially along an axis between distally spaced first and second axial ends, wherein said second axial end is axially spaced downstream from said first axial end along a first axial direction, and said first axial end is axially spaced upstream from said second axial end along a second axial direction, said second axial direction being opposite to said first axial direction, an inner shell spaced radially inwardly of said main body by an annular volume therebetween, said inner shell having an internal volume radially inward of said annular volume, said muffler having an inlet receiving exhaust into said internal volume, said muffler having an outlet discharging exhaust from said internal volume, said muffler having primary and secondary parallel paths therethrough, said primary path extending through said internal volume, said secondary path extending through said annular volume along said first axial direction.