I just got my '11 MCS about 2 weeks ago. I've only managed to put about 250 miles on it so far . Anyway, on my '06, El Kabong, I always wanted to upgrade the exhaust but kept putting it off. This time I've decided to do it and enjoy it! I have an NM Engineering exhaust and was planning on having it installed next week when I get the driving lights installed. Is there any reason I should wait? It's really hard for me to get the time to take my car to have anything done, so I was trying to be efficient, but want to see if I'm jumping the gun. Annette Ooops, just realized I put this is in Cooper, not Cooper S. I'm dupiicating, so mods feel free to delete this thread. Sorry.