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      09-03-2010, 12:04 PM   #4
Radiation Joe
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Drives: '11 JB/BBe-6sp-e90
Join Date: Jul 2008
Location: Macungie PA

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Garage List
2011 e90 M3-Sold  [4.25]
2003 RS6 - Sold  [0.00]
2009 e90 M3 - Gone  [0.00]
2003 M3 SOLD  [0.00]
old 2002  [5.00]
Don't lower the car at all. The effect on suspension geometry is much worse than the improvement due to reducing the center of gravity. This is usually compensated for with significantly stiffer springs.

If you lower for handling improvement you might have to do something like below. To improve the roll center, the strut is modified to lower the outer pivot point of the lower control arm.