You dont neeeed nitrous to go fast but it will make you faster. See there is this saying there is someone that is always faster then you haha he was probbly using a 200 shot with a smaller motor (jk around) and he beat you cuz he had more.ITs like a turbo or blower or ne forced induction they all help you make power but some are better then others depending on what you are doing with your car.If i had a choice of either nitrous turbo or blower i would go nitrous easyer to tune with out many modifications.Also best bang for buck that i have seen but that is what i think. I might just lean towards nitrous cause I will be running it,and think its cheap hp.

2 cents