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I'm currently in the modding process. I have a 2011 e90 335xi. So far I have the VRSF DP and AFE intake. I have the VRSF 7" intercooler and charge pipe I haven't installed yet also installing a MHD tune afterwards. I guess my question is that has anyone had a rough or an unsteady idle as they were putting these aftermarket performance parts on. I noticed my idle become really rough and unsteady when I installed the DP, it had calmed down a lot since I installed the intake. It still idles a little rough and unsteady. Will that go away once all my parts are in and the car has a tune?
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