A connecting structure for exhaust pipes wherein a first connecting flange is connected to peripheries of downstream-end portions of a plurality of upstream exhaust pipes, a second connecting flange is connected to peripheries of upstream-end portions of a plurality of downstream exhaust pipes, and a...http://www.google.es/patents/US6406066?utm_source=gb-gplus-sharePatente US6406066 - Connecting structure for exhaust pipes
