Mixed reviews on KW V series c/o's. I'd spend a couple hundred more and get KW Street Comfort c/o's. Linear rate springs engineered for oem flat ride and probably better damping than Koni's. Just m.o. I don't have 'em.
2007 E90 335i, TiAg, 6AT, ZPP, ZSP, ZCW, 6FL, HD
Quaife lsd, ETS fmic, GIAC s/w, Dinan intake/exhaust/oc, KW/GC/M3/Meyle susp, Apex Arc 8, Mich PSS