would the stillen rear sway bar from a 99 g20 work on my 01 g20

try some stiffer shocks first. my P11 doesn't roll that much after getting a set of TEIN's. sway bars are pretty tricky to setup...for best results, you're gonna need a few rates, which most places dont offer... so, work around bodyroll with shocks first. I can take some seriously fast turns on my P11.