Although I don't have any experience with the KWs on a 370Z specifically I have driven them on other cars like Evos, 350Zs, etc. They are an excellent coilover for sure, but for most people's needs, I must say the performance difference between the KW V3 and the BC Racing ER doesn't outweigh the cost difference. I personally think the BC Racing coilovers are a better bang for your buck. And this is not a biased opinion, I sell both brands and actually make a bigger profit on the KWs.
