Quote:
Originally Posted by xbrentx
Yes you are right 2011 went linear much better, bmw performance suspension less of an upgrade on 2011 not needed
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I went from a 2008 135i to a 2011 135i and didn't feel any difference in the springs, even though BMW reported using different springs in the rear for the 2011+ 135s. Weird.
Also, the BMW Performance suspension lowers the car 10mm and is 34% stiffer so there is some benefit to having it, even on the 2011+ 135s.