Cause it's in the mail to you!! Number 1,2 and 3 intakes have a little too much leakage...15-25%. Exhaust are perfect, piston and ring seal the same. If you can turn it around quick, I can wait, besides the Stage III is tight on ex side with cam degreed etc. .048! Have to fix that anyway. That's why I called Saturday or Sunday. Yes it had a Dyna DR 400 limiter on it, high side lowest setting is 10,000 rpm. So not sure it's working, Frank took it off one of Glady's bike, was good then, maybe now. But I bought a new DRL300 Dyna limiter, it can be set 6-12,000. I can check it now fairly easy. I know I gotta pay double/ triple price for f'ing up your beautiful head. Really just needs 3 new intakes, bet seats are fine, but that's up to you! All I want for Christmas is my Stage IV back and a 10 second pass! Merry Christmas, Bill
P.S.......call me please sir!