Quote Originally Posted by fraser5454
Thanks, forgive the question, what does the pro kit do? I don't want to harden or need to drop the suspension, unless they improve the ride? I would guess the springs help reduce the roll, can the ARB not do that alone?

#suspensionforidiots :-)
The springs will help stiffen it up a bit and eliminate some of the roll, cog is lowered slightly and paired with the updated arbs I doubt you will have any issues with roll again the spring I mentioned is probably one of the most comfortable springs for bmws it's not to aggressive and will give you a nice balance its only a little stiffer then msport and the drop while enough to give a noticeable difference in handling shouldn't have you crawling over speed bumps or heading to the dentist every time you hit a pothole


Edit: just to add you could always go for the arb alone and see if that suits you before making a decision on the springs