Catalytic converter substrate.

摘要

There is disclosed a catalytic converter substrate (12) of curved cross-sectional profile comprising a stack (22) of modules (36) individually formed of folded metal foil having contacting layers defining passages therebetween. The modules (36) have a uniform thickness but various widths so as to conform the stack (22) to the desired profile but with the combined thickness of the modules (36) being made oversize such that the contacting layers are frictionally held together against relative sliding when the modules (36) are compressively loaded by a retainer (34) to completely conform to the desired profile.