Abstract: An exhaust processor includes a housing formed to include an interior region and a partition or first spark arrester that partitions the interior region into chambers and includes a wool filter formed to include an opening. The wool filter is positioned to filter unburned carbon particles from combustion product generated by a vehicle engine. The exhaust processor further includes an outer conduit that extends through the opening formed in the wool filter and is formed to include a passage and an inner conduit that extends into the passage and is formed to include an opening through which unburned carbon particles flow from inside the inner conduit to impinge against the outer conduit so that the outer and inner conduits operate as a second spark arrester.

Abstract: A muffler assembly (10, 210, 350) includes top outer shell (12), bottom outer shell (14), and drop-in inner cartridge (16, 212, 352) positioned to lie between top and bottom outer shells (12, 14). Top outer shell (12) abuts bottom outer shell (14) to define seam (71). Seam (71) includes inner surface (73) facing into interior cartridge-receiving chamber (76) defined between top and bottom outer shells (12, 14). Drop-in inner cartridge (16, 212, 352) includes outer edge (75) abutting inner surface (73) of seam (71) to cause drop-in inner cartridge (16, 212, 352) to lie wholly within interior cartridge-receiving chamber (76). Drop-in inner cartridge (16, 212, 352) includes inlet and outlet tubes (86, 88, 214, 216, 354, 356) and baffle system (23, 215, 357) having first side (142, 272) connected to top side (91, 231) of inlet tube (86, 214, 354) and second side (150, 280) connected to bottom side (97, 237) of outlet tube (88, 216, 356).

Abstract: A double throat tuner including a second conduit concentric to a first conduit which connects the gas flow to a first volume tuning chamber having a first effective volume. The radial difference between the first and second conduits and the length of overlap of the first and second conduits in combination with the effective volume of the first tuning chamber attenuates a preselective frequency of sound. This attenuation is for a specific frequency range in addition to the overall attenuation of the complete system including a plurality of conduits serially connected by a respective chamber.