Bit odd this...
I had my GT4 rolling roaded yesterday on a machine that goes up to 300bhp and quite quickly my car went off the scale. So i thought this meant that it had just over 300bhp which i was very pleased with as i have only fitted a PiperX induction kit, however the operator insisted that it was doing 330bhp+ and could not be argued with!
Has anyone else had anything like this happen?