I know there are many discussion about lowered suspension and bump stops (
http://www.e90post.com/forums/showthread.php?t=836365,
http://www.e90post.com/forums/showthread.php?t=699650, etc.), but I am a bit confused. If I install lowered springs (Eibach Pro Kit "i" springs) on the OEM e90 shocks, I need to cut the rear bump stops or install new ones (E36 M3 [front] 3133 2225 377, E86 Z4M [rear] 3353 6770 350). Fine. But if I install lowered springs and Bilstein sport shocks, do I need to cut/change the bump stops? Or the bump stops ("auxiliary shock absorber" in the BMW words) are specific to the OEM shocks only?
Thanks in advance for your help.