Probably, i would think they ran it stock then added fuel for best hp gain. It was a long day so they must have played with stuff to see what would work best? I for sure thought Aaen was gonna be right up there. I expected slp to be down, kinda on the first to market thing. Well see the details soon.But like Fastsledder said nothing is going to be over 10 +/- 1 hp for just a pipe add on.