Q: Is a 4-way race coilover too much for a street-driven car?

Not necessarily. The page notes enthusiast-level drivers appreciate how well these work over any road surface, precisely because they were developed on the Ring’s punishing variety of corners and pavement. That said, this is a serious motorsport system, and it does not have the under-hood remote damping adjustment some other UP coilovers offer. If you mostly street drive and want convenience, a simpler UP coilover may suit you better.