Patent ID: 8365522

Claim:
A dual exhaust system comprising: at least one first exhaust component defining a first exhaust path that comprises a primary exhaust path to extend from an engine to an exhaust outlet; at least one second exhaust component defining a second exhaust path different from said first exhaust path, wherein said second exhaust path comprises a secondary exhaust path that extends from a first connection interface at an upstream location of said primary exhaust path to a second connection interface at a downstream location of said primary exhaust path; wherein said primary exhaust path extends from a first set of engine cylinders to a first muffler and said secondary exhaust path extends from a second set of engine cylinders to a second muffler, and wherein said primary exhaust path is configured to selectively direct exhaust gas from said first and second sets of engine cylinders to flow to both of said first and said second mufflers with said secondary exhaust path only to direct exhaust gas from said second set of engine cylinders to said second muffler; at least one first valve associated with said first exhaust path; and at least one second valve associated with said second exhaust path, wherein said at least one first valve and said at least one second valve operate independently of each other to vary exhaust flow.