Abstract: A flexible catalytic converter apparatus for use in internal combustion engine powered vehicle exhaust systems. The flexible catalytic converter apparatus includes a vibration decoupling exhaust connector and a catalytic converter insert disposed within, one of the components of the vibration decoupling exhaust connector.

Abstract: A flexible coupler apparatus for joining successive lengths of pipe in an exhaust system for a vehicle. An inner sleeve member is concentrically received by an outer sleeve member. A substantially porous, non-sealing, vibration absorbing spacer member is arranged between the sleeve members where they overlap, to preclude direct contact between the sleeve members. The spacer member is non-sealing to preclude deterioration while minimizing interference with the reciprocation and articulation of the sleeve members. A flexible, extensible member mechanically connects the sleeve members at their distant non-overlapped ends. A closure member may be employed to protect the extensible member from damage from external elements and forces.

Abstract: A tubular sock made of fibrous material is placed over a louver patch formed in an exhaust flow tube mounted in a muffler to attenuate engine exhaust noise. A slip tube is provided for preventing the tubular sock from becoming entangled on the louver patch as it is being placed on the exhaust flow tube.