i should be getting my h&r springs(1 inch drop) and illuminas in about a week. Is there anything you guys suggest doing besides cutting off 2/3 of the bumpstops?? And how hard is it to do myself??

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2003.5 M3
99 M3
99 GST

If you are talking about the H&R OE springs you do not need to cut the bumpstops at all. You only have to cut the bumpstops on the H&R sport and race springs.