1) coupe, S54
2) TCL D/A
3) front: 500#, rear: 500#
4) street & track
5) DE events, <= 8 days per year
6) stock oem swaybars
I had an option of 450# or 500# front spring rates when I bought the TCKs, and I opted for the stiffer ones.
So far as good, even though rears are supposed to be stiffer
I have no idea about spring height, but if I had to guess, maybe 6" fronts, and 5" rears?