I recently purchased a used 2003 330xi with lowered springs on all four corners. My opinion on doing such a thing to an xi may save someone a set of tires. The tires on this car have under 10k miles on them. All four tires are completely worn off on the inside edge. So save yourself some trouble if your thinking about lowering your 330xi. That is unless you plan on trying to somehow fix the camber angles. I installed stock springs back in the car today. She sits like she should now and the tires no longer are looking like the front end has been squashed down permanently. Now I need to buy new tires for it even though the thread on them is probably good for another 30k or more on the rest of the tire.