I take off the cai when I go in. I asked the S.A. how they felt about it and my feeling was he wouldn't really care but I still don't take any chances, it's easy enough to take on and off. Nothing said about exhaust cause it's a BMW part. I did all the mods myself and I'm by no means a gear head. The exhaust was a hour job but I know a guy who has a lift and that saved alot of time.
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