Abstract: A method of making a catalytic converter for use in the exhaust systems of combustion engines comprises the steps of inserting a porous monolithic refractory catalyst element inside a tubular metal shell with a resilient annular fibrous sleeve around the element, securing the element in position inside the shell, and thereafter attaching inlet and outlet headers to the shell by fitting annular end sections on the headers to the exterior end perpheral surfaces of the shell and welding them thereto.

Abstract: A catalytic converter, and method of assembling same, adapted for use in the exhaust systems of internal combustion engines comprises a housing including as a part thereof a tubular shell having a differentially hardened, annular fibrous lining to resiliently support, insulate, and secure a monolithic type catalyst element. The ends of the tubular shell extend beyond the fibrous lining, which in turn extends beyond the upstream and downstream ends of the catalyst element. The ends of the shell and the ends of the fibrous lining are angularly deformed inwardly to protect the corners of the catalyst, to minimize gas impingement on the fibrous material, and to mechanically retain the catalyst in position.