Quote:
Originally Posted by rennis
You could probably do it either way. The E92 M3 guys have been doing this for years, and a lot of them only cut one side so that you cannot tell the suitcase has been modified visually from underneath.
Search "OEM Exhaust Mod" on any E92 M3 forum and you'll get lots of hits.
I was attempting to do the same thing with the Suitcase on my 50i M Sport, but the shop advised just to do magnaflows (the same shop has done the OEM mod on several M3s...)
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The main reason why I did it to be able to use the valves and that was the key for me and also not spend 4K for a system