If you want to SLAM your ride, get a skid plate. Our cars seem to have the lowest of all oil pans on e30s. Even though we have a 2 piece deal, you will sometimes crack both upper and lower oil pans.
As to the H&R cup kit, I know someone who had it and fuxxored his upper and lower oilpans. He didn't do it on purpose - you can only drive carefully to a certain degree and swerving a man hole cover or huge pothole is always easier said than done