i had a 2000 Z28 which also had upper and lower A arms with coilovers. i put a shock tower brace the month i bought it. i didn't notice a difference. but five years later my car was a lot tighter than other 2000s because of that and subframe connectors i had installed at the same time.

the point is that the STB and SFCs help to stiffen the chassis. maybe the chassis is stiff enough now that it doesn't make much of a difference in handling.

does anyone make subframe connectors for the kappa?