I need to buy a aftermarket cat for my ml430 ..but i dunno which one can handle it..I already bought a after market one ( universal from local muffler shop) and it failed with in 6 months..it is clogged and i get no power i cant even rev past 3500 or it misfires.. I cant afford a OE Cat and i used the service campain to pay for the last aftermarket one.;..anyone have any suggs on a aftermarket cat that will last at least 2 yrs?

help sna623@Yahoo.com