I was running 4.10's. I think the thing that benefited me the most was the fact that I was running fully loaded (and on street tires) so when I launched it didn't break loose at all. I could even hear my struts top out in the front with a loud thunk. I was running 2 15" subs in a HUGE box in my trunk so I had another probably 60-80 pounds of dead weight back there...not to meantion the extra 40-50 pounds of air horns/compressor/tank.