Ya, I thought that seemed a little long too at first, but given the amount of info they asked for, and some of the teams they work for, who am I to argue. The car is not being built for the dyno, but for the street and autocross. Looking at some of the old F-1 cars and Indy cars from back when turbos were not banned, it is interesting to see how long their primaries were - given the RPM range. I think short headers are probably popular for packaging and obvious OEM considerations. We'll see.