OM606 NA catalytic converter replacement

[michakaveli]

Hey guys, any ideas on some aftermarket cats for the NA engine - The OEM is like $600. I can find better things to use $600 for. The NA has 2 separate downpipes that lead into the cat and on the other end they both combine into a single unit. I was thinking maybe 2 small high flow cats and then a y-pipe on the back end to connect to the rest of the exhaust.

Anyone know of any muffler shops in Columbia, SC that you would trust?