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      01-24-2012, 08:56 PM   #7
CJ421
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Drives: 2017 F30 340i
Join Date: Feb 2011
Location: Philadelphia, PA

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What is the budget? I just want to know so I can suggest something that costs a lot more.

I vote - none of them, get a limited-slip differential + M3 subframe brushings.

If I had to pick from your list, I would do FMIC for sure, on an N54 it is a very important mod (especially w/ engine mods). Get the Helix one.
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2017 BMW F30 340i - Mineral Gray/Coral Red, M Sport, Track Handling, 6MT