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      07-13-2011, 10:47 AM   #14
Vintage's Avatar

Drives: 2017 M2 2014 535xd 2016 GT4
Join Date: Aug 2009
Location: Austin, Texas

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Your best gains, I think would be with the aFe (new) cold air intake system at about $500 and a cat back exhaust by Eisenmann (roughly $2,500). Using them in combination, you would probably pick up quite a bit of hp without doing anything complicated other than spending $$$ + that NA I6 would sound awesome with those items. BTW, I love the 30i and probably would have bought that with a MT and the M Sport package if I had the benefit of hind sight. Don't get me wrong, I have one of the fastest N54s around and it is wicked, but we plan on keeping this instant classic as our 3rd car forever, and I worry about longevity/service, etc. based on my experience thus far.