i managed to do a 4-3 at a trackday a few years ago, on of course what would have been my best run of the day. at the time, i had an s-afc, and i hit like 8599rshared_pm or something...which is normal for some cars, but not a turbo ka24de lol. car still ran many passes after that w/o any ill effects. i got it on vid too lol