I've run both, and won't run 14" long QA1's again. Bowed bad, ate the sides of the seal carriers on my shocks. 10's as an upper coil, no problem, but 14's, no way, I don't need the threads getting chewed off my shock bodies or my seal carriers getting wasted. They also settled noticeably (and out of square) in a very short timeframe, and to slightly different heights than each other.I have noticed QA1 has coilover springs and they are bit cheaper than eibachs...Anyone have experience with the QA1s ? I am interested in thoughts to quality in comparison to something like eibach.. Thanks.