Patent ID: 7770690

Claim:
Double-flow exhaust system for an internal-combustion engine comprising: two exhaust-gas-carrying pipes that are configured to receive gasses produced by the internal-combustion engine, at least one muffler and catalyst housing associated with each exhaust-gas-carrying pipe, each muffler including at least two ports extending therefrom, wherein each port of a muffler is provided for either receiving exhaust gases from another muffler or directing exhaust gases out of the muffler, a first removably mountable connection pipe for fluidically connecting the mufflers of the exhaust-gas-carrying pipes, wherein the first removably mountable connection pipe is a T-pipe that includes two inlet ports that are oriented along a common axis and an outlet port that is oriented substantially perpendicular to the common axis of the inlet ports, each inlet port of the first removably mountable connection pipe being configured to be removably mounted to a single port of a respective muffler to receive exhaust gases from the muffler, and said outlet port of said first removably mountable connection pipe being configured to discharge the exhaust gases to a location outside of the internal-combustion engine, and a second connection pipe for fluidically connecting the mufflers of the exhaust-gas-carrying pipes, wherein the second connection pipe includes two connecting pieces each extending out of a respective muffler housing, wherein end faces of the connecting pieces are separated by a gap that is covered by a joint sliding sleeve that is directly connected to the connecting pieces.