It isn't a "true" two step. Well, kind of.... There is your normal rev limiter and an idle rev limiter. (I have the x-cal 2) When you have a tune made, the tuner can leave tons of optional parameters unlocked, one of which being neutral rev limiter. My tuner is great and will unlock them. I just got a new set of wheel and tires and sense he left the revs per mile unlocked, I was able to adjust for it, instead of having to pay to have it "retuned". I am going to be going to the track this coming weekend. I will be giving it a shot.