'88 300SE Catalytic Converter
 

Purchased a catalytic converter from ******** Arizona. The one in my car has a larger area (physical size exterior) than the one ******** sent me. The new one also does NOT have the expansion chambers or pre cats, right below the connections at the exhaust manifold. Does this matter. Will this still work on the m103 ok? Any performace issues? It seems that all the bends are in the same place and angled right. I mean I'm pretty sure it will bolt in place ok, and the pipe seems to be the right diameter. Has anyone had any experience with the ******** converters on an S Class? Thanks

Just expect higher emissions & catalyst failure in 2-3 years, at best.