I'm curious about this as well. My car-see sig- has hit an indicated 150mph and I simply ran out of straight road but it was still pulling. I thought the current jb4 for the n55 couldn't defeat the electronic speed limiter? Even with the sport pkg it shouldn't get to 150+ should it?
CURRENT--2014 2LT Z51 Corvette Coupe-7MT
PAST--2011 335i xDrive coupe-6MT-