Muffler with baffle defining multiple chambers

An internal combustion engine, comprising:

• an engine block including a cylinder;
• and
• a muffler assembly configured to receive exhaust gases from the cylinder, the muffler assembly comprising:
• a housing defining an interior volume and including an exhaust inlet and an exhaust outlet;
• and
• a baffle assembly positioned within the interior volume, the baffle assembly comprising a plurality of chambers in fluid communication with each other;
• wherein the plurality of chambers comprise a first chamber, a second chamber, a third chamber, a fourth chamber, and an outlet chamber;
• wherein the plurality of chambers are in fluid communication with the exhaust inlet and the exhaust outlet so that the plurality of chambers are configured to cause the exhaust gases to be directed through the muffler assembly from the exhaust inlet to the exhaust outlet through four passes in the baffle assembly before exiting through the exhaust outlet;
• wherein the first chamber is in direct fluid communication with the second chamber so that the first chamber and second chamber are configured to cause the exhaust gases to flow into the first chamber and the second chamber from the exhaust inlet to complete a first pass;
• wherein the third chamber is in direct fluid communication with the second chamber so that the second chamber and the third chamber are configured to cause the exhaust gases to flow into the third chamber from the second chamber to complete a second pass, wherein the second pass is in an opposite direction from the first pass;
• wherein the fourth chamber is in direct fluid communication with the third chamber so that the third chamber and the fourth chamber are configured to cause the exhaust gases to flow into the fourth chamber from the third chamber to complete a third pass, wherein the third pass is in a substantially perpendicular direction from the second pass;
• and
• wherein the outlet chamber is in direct fluid communication with the fourth chamber so that the fourth chamber and outlet chamber are configured to cause the exhaust gases to flow into the outlet chamber from the fourth chamber to complete a fourth pass, wherein the fourth pass is in a substantially perpendicular direction from the third pass and is in the same direction as the second pass.