I don't know much about suspension systems, but i hope my review can help a few people out on which coilovers they want. First off these coilovers were shipped to me super quick! I decided to switch out my OEM sport suspension at 40,000 miles to these Sonic tuning S1 coilovers because i love the way lowered BMW's look. At first i was thinking about purchasing the KW V1's, but these coilovers were priced reasonably well i just couldn't pass up the deal.
I have no idea what the settings are on, but the ride quality is not bad at all. a bit bumpier/stiffer then before but overall it's still a good ride. The handling is very responsive and there is very little body roll, the car stays almost flat going into turns or corners (it is much more fun to drive).
The rear is at its lowest I believe. Since Houston roads aren't that great I will leave it as is right now, but I will lower the front once i feel more comfortable.
Wheels are AluFelgen CS7 wrapped in Falken FK452.
F:19x8.5 ET35 225/35/19
R:19x9.5 ET30 265/30/19