12.0 an up have been run on the street, it has happen'd but why push it the power you will make won't be worth the edge you running on, if you make 187at 11:7.1 you will only make about 194-195 at 12.7 just an example, is it really worth that 6-8hp for running on the edge if not over it on street gas and you have to remeber how hot it get's on fl, but i think at 12.7 it won't last till summer so that not a prob,