Most of the aftermarket BMW catalytic converters I have run across consist of small and noises converter weld that have been bent to fit the shape of cars. When this occurs it will cause restriction in the exhaust flow, which of course you don't want happening. When you put aside cost your best bet is to lean towards factory BMW catalytic converters over other markets to receive the best quality. I'm sure you expect nothing less.

A lot of people want to get their hands on a BMW because not only are they a high performance car, but they also look so good. BMW catalytic converters are equipped with two catalysts: the reduction catalyst and the oxidation catalyst. Both of these are made of metal with ceramic structure.

Consumers if you come across a strong smell coming from your exhaust pipe or a whistling noise when starting up your BMW , this probably means that the catalytic converter is clogged. Not a big deal. Take time to browse here and see that you can find well priced reliable BMW catalytic converters. If you are looking for performance or high flow BMW catalytic converters you can find it here.