mine is a mk5 2.5 high roof 100 with 190 back end
and is screaming at 75mph and that with your foot on the floor pushing it into the rubber mat let the foot up a bit and it starts slowing down to 65mph so i think 65mph is my max
I got the 120mph out of a swb transit 125 once coming back form wait i leave that bit to myself
i was trying to go faster but the steering got very light so i slowed down