Patent ID: 8661795

Claim:
An exhaust system for exhausting exhaust gases from a small engine having multiple cylinders, said exhaust system comprising: at least two exhaust units, wherein each of said exhaust units comprises: a primary chamber; a headpipe directly and fluidly connected to said primary chamber for introducing exhaust gases into said primary chamber; an outlet fluidly connected to said primary chamber for exhausting exhaust gases from said primary chamber; a primary stage transfer tube, wherein at least a portion of said primary stage transfer tube is located within said primary chamber, said primary stage transfer tube fluidly connecting said primary chamber with said outlet; a catalyst located within the primary chamber between said headpipe and said outlet through which said exhaust gases pass as said exhaust gases flow from said headpipe to said outlet; and a canister, wherein at least a portion of said canister forms an outer wall of said primary chamber of each of said at least two exhaust units; wherein each of said at least two exhaust units is separated from at least one other of said at least two exhaust units by a common chamber wall, wherein said chamber wall maintains separation between exhaust gases flowing through each of said at least two exhaust units.