Abstract: A method for manufacturing a tail pipe replacement kit for automotive vehicle comprises forming a first arch section and a second spout section separate therefrom and connectable thereto. The two sections in kit form are secured together in overlapping relationship expediently using adhesive tape. Cardboard cheeks sandwich the bight of the arch to enclose therewith a space wherein hardware for the assembly of the kit is enclosed. The arch sections are conformed to fit within the spatial envelopes of a plurality of vehicles. It is found that some 25 different kits can service a market presently serviced by about 250 tail pipes formed as a unitary whole. The kits are easier to transport and easier to install in comparison to unitary tail pipes.

Abstract: An exhaust extension pipe kit for replacing original equipment of different size and configuration, where the connector to which the exhaust extension pipe connects is of a ball type and the original equipment have differing ball radii, wherein the exhaust extension pipe is dimensioned to connect to the large diameter ball and an adapter is provided for connecting the smaller diameter ball which is configured as a cup-like body having an opening in the base thereof together with means for restricting the non-axial rotary movement of the adapter.

Abstract: A tail pipe kit for automotive vehicle comprises a first arch section and a second spout section separate therefrom and connectible thereto. The two sections in kit form are secured together in overlapping relationship expediently using adhesive tape. Cardboard cheeks sandwich the bight of the arch to enclose therewith a space wherein hardware for the assemby of the kit is enclosed. The arch sections are conformed to fit within the spatial envelopes of a plurality of vehicles. It is found that some 25 different kits can service a market presently serviced by about 25 tail pipes formed as a unitary whole. The kits are easier to transport and easier to install in comparison to unitary tail pipes.

Abstract: A muffler wherein the shell comprises a metal sheet the ends of which are retained together in an interlocked joint has a shielding strip on the interior of the tube secured thereto in overlapping relation to the interlock. Preferably the sheet is a two ply, one end of the inner ply being retained in the joint, the other end forming the shielding strip, the edge of which is spot welded to the interior surface of the shell. The muffler is resistant to damage from back-fires.