Patent ID: 7520127

Claim:
An engine comprising: a cylinder head defining first, second, third and fourth cylinders; and an exhaust manifold connected with the cylinder head, for conveying exhaust from the cylinders, the exhaust manifold comprising: first, second, third and fourth exhaust branches connected, respectively, with the first, second, third and fourth cylinders; a first convergent branch into which the first and fourth exhaust branches converge together; a second convergent branch into which the second and third exhaust branches converge together; and a collection portion into which the first convergent branch and the second convergent branch converge together; wherein the second and third exhaust branches extend, respectively, along center lines intersecting each other at a second convergent point which is located in the second convergent branch and which is not located within the collection portion; wherein the first and fourth exhaust branches extend, respectively, along center lines which extend through the first convergent branch without intersecting each other, and which intersect each other at a first convergent point located in the collection portion; and wherein the exhaust flow path between the cylinder head and the second convergent point is shorter than the exhaust flow path between the cylinder head and the first convergent point.