The problem with KW, whether it be V1, V2, or V3, is the lack of flexibility in spring rates along with their use of progressive rate springs. The dampers are also going to be limited in the range of spring rates they can handle. I really just can't recommend KW for high performance/track driving. They're great for people who want a drop with a decent ride and a level of quality beyond some of the low budget trash available while still keeping within a reasonable budget.
04 IR 330i ZHP | ESS TS2+ SC | MagnaFlow "headers" | KMS 3.64 LSD | AST 4100 550/650| APEX ARC-8 18x9 | H&R front sway bar | Vorshlag camber plates, RTAB limiters | TMS subframe & swaybar reinforcements | UUC SSK & DSSR | UUC TM & TME | BW motor mounts | Dinan strut & shock tower bars | vaio 4-bolt oil pump