Well lets see, just for estamate we will say that you are correct, and we can stop at 122 feet with no rear brake upgrades and Z32's in the front. Well lets say you get a 7% greater braking power 122 x .07 = 8 feet, 8 feet is halfway into someones car, so I think its worth it, plus it looks lame having these big brakes in the front and tiny stockers in the back.