Patent ID: 8661798

Claim:
An air entrainment component for a vehicle exhaust system comprising: an exhaust pipe extending between first and second pipe ends to form an exhaust gas pathway, and wherein said first pipe end is connectable to an upstream exhaust component and said second pipe end has non-circular cross-sections extending along a pre-defined pipe length; an overlap tube having a first tube end connectable to a downstream tailpipe and a second tube end that surrounds the second pipe end along the pre-defined pipe length to form at least one air gap between the exhaust pipe and overlap tube through which cooling external air is drawn in to cool heated exhaust gases within the exhaust pipe; and wherein the non-circular cross-sections are defined by an outermost peripheral surface portion having a maximum outer dimension that remains constant along the pre-defined pipe length and a variable outer peripheral surface portion having an outer dimension that is less than the maximum outer dimension and which varies along the pre-defined pipe length.