Maybe the brake lites so everyone knows if you are scared LOL.. I am not a driver but you might be surprized on how many vehicles I have read the data log that never made it to WOT and want me to adjust the tune-up Turk, Wenz and Amo all excused from that one actually Jon W as well..He hit the nitrous on a poor track about 2 more times than i would have tried to try to find a good piece of race course last year.. Steve Knecomb<spellimg?> as well he took a tour of the whole course and rolled in and out of the throttle several times and I saw the wheel slip go to the moon on each occasion usually they are not the ones I have normally worked with but ask me to look and see what might be done. Everyone I have tuned for in the past that are my deal know I am data logging both TPS and gear position..until I see WOT in high gear for a timed mile really don't want to talk about tune-up..LOL But yes the brake lites.. Only kidding I think Dan W can give you a better answer but would suspect it is an aero consideration more than anything.. I would ask whoever is in the rule book listed as head of car tech..
Dave