E90/E91/E92/E93 (2006 - 2013)
I'm looking into getting some coil-overs for my e90, but I'd like to take care of anything else while I'm taking care of that. I've seen air-lift kits that have for example, new control arms or ball joints, would I need any of that if I plan on lowering the car 1.7 in the front and 1.5 in the...