High flow oxidizer trap for E300
 

Fellas,
I've had a 3" straight pipe (turbo back) exhaust on my E300 for the past two years. The only muffling device I have is a Brabus muffler on the end of the straight pipe. The car has an awesome roar to it. However, I'm growing a little tired of the sound and would like to muffle it slightly. I was thinking about adding a MagnaFlow universal diesel convertor.
Has anyone had experience with these? If so, which one would you recommend for my use? I'm assuming I'll have to use the smallest option with a 3.5" inlet and a 4" outlet. Any insight or suggestions are appreciated.

The Official Site of MagnaFlow Diesel Exhaust Products / Diesel Converters

Those cats seem to work well, lots of TDI guys use them. They aren't legal in CA.

Thanks for the feedback. This is probably the route I will go.