I have to say that I absolutely love the V4
Was thinking buying a set after I got the new wheels but, mine plans changed last minute
Spring rate was a little higher then stock, it was perfect for me.
It reminded me on mine E36 M3 that I had KW in Europe.
Just much more compiled it wasn't to stiff that would hurt you after long drive.
I could only drive 2 hours on E36 before back started to hurt. Lol
This felt so good that really made me think a lot to buy it.