Patent ID: 7458210

Claim:
A vehicle exhaust apparatus configured to constitute an exhaust passage to an exhaust muffler from a plurality of exhaust pipes connected to a multi-cylinder engine, the vehicle exhaust apparatus comprising: an exhaust collector portion configured to connect to an exhaust gas downstream end of each of the plurality of exhaust pipes so that the exhaust pipes are collected at the exhaust collector portion; and an expansion chamber having an exhaust gas upstream side connected onto an exhaust gas downstream end of the exhaust collector portion, the expansion chamber being formed, at the exhaust gas upstream side of the expansion chamber, so as to expand outward from the exhaust collector portion, in a substantially arc shape when viewed in a direction substantially orthogonal to an exhaust gasflow direction of the expansion chamber, and the expansion chamber further being formed, at an exhaust gas downstream side of the expansion chamber, so as to contract inward along an arc shape of the expansion chamber when viewed in a direction substantially orthogonal to the exhaust gasflow direction of the expansion chamber; wherein the expansion chamber is formed in a substantially spherical shape.