Patent ID: 7856812

Claim:
An exhaust device of an eight-cylinder engine comprising: an exhaust manifold extending from the-first, second, third, fourth, fifth, sixth, seventh, and eighth cylinders ignited in that order, the exhaust manifold comprising: first, second, third, fourth, fifth, sixth, seventh, and eighth upstream exhaust pipes extending respectively from the first, second, third, fourth, fifth, sixth, seventh, and eighth cylinders; first, second, third, and fourth midway exhaust pipes extending respectively from a joined portion of extended ends of the first and fifth upstream exhaust pipes, a joined portion of extended ends of the second and sixth upstream exhaust pipes, a joined portion of extended ends of the third and seventh exhaust pipes, and a joined portion of extended ends of the fourth and eighth upstream exhaust pipes; and a downstream exhaust pipe for connecting extended ends of the first, second, third, and fourth midway exhaust pipes to the ambient atmosphere.