I havent installed it yet its at the shop getting heads and cam right now, but im kinda doing everything at once so I should be in for some big gains. I dont know anything about your car but the grand prix have a dinky little fuel pump harness and it constricts power to the fuel pump, Thats why I bought one.
What mods have you done so far, I really like your headlights, car almost resembles a gto, or "holden manaro"