"im doing whitelines on a G8 right now , with HR springs and gxp struts/shocks"
Let me know what you think of those results. I am planning the same thing for mine.
I already have the GXP struts and am about to buy the bushings and HR springs.
WAY over due.
Also, would you happen to know if Camaro wheels fit with that set up. I have them sitting in my closet and wait to put them on.