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Old 06-30-2014, 02:28 PM   #5
Registered User
Join Date: Jun 2006
Location: San Jacinto, CA
Posts: 2,364
My Ride: '01 330i, '11 Z435i
Lowering springs have a very serious negative - that being the fact that they reduce suspension travel; specifically suspension travel from the resting height to that when the bumpstop is contacted under compression.
I have the H&R Touring Cup Kit which uses the sport springs. I've found that the suspension doesn't compress as much as it used to even considering it's starting from an already more compressed point. Speed bumps I used to have to crawl over lest the chassis thump down on it are actually less of a problem...
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