I'm looking for a milder drop than even the 435i H&R springs and it doesn't seem like there are many options. Eibach doesn't even have 4-Series springs in the US yet, much less M4 springs. The only other options are full sleeve overs from KW, which is a bit much for my needs. Anybody give Dinan's 435 springs a try on an M4?
http://dinancars.com/product/d100-09...-f32-435i-rwd/