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No never did it because no one has given me an input regarding this, I want to know exactly what I must do in order for it to work but no one has said anything, I am thinking of just going to my local muffler shop and checking it out and see what they say. have you done any other mods to your car?
Hello kefking87,
I was saw ur thread about doing a X pipe conversion. Did you ever get to doing it? I'm thinking about doing it, but afraid i might get droning at cruising speed. I have a 2011 E550 Sedan.