Patent ID: 7634908

Claim:
An exhaust system for discharging combusted gases from a vehicle engine, which comprises an exhaust manifold with a plurality of exhaust gas runners, wherein the plurality of exhaust gas runners include (a) a plurality of first exhaust gas runners each being connected to a corresponding exhaust valve of a corresponding cylinder, (b) a plurality of second exhaust gas runners each being connected to corresponding two or more of the first exhaust gas runners, and (c) at least one third exhaust gas runner each being connected to corresponding two or more of the second exhaust gas runners and connected to a cylinder head of the vehicle engine; wherein the plurality of exhaust gas runners are arranged so that the exhaust gas can sequentially pass the first exhaust gas runners, the second exhaust gas runners, and the third exhaust gas runner or runners to be discharged and are spaced so as to avoid an exhaust gas interference, and wherein the plurality of exhaust gas runners are formed inside the cylinder head.