The engine has been de-tuned by extending the actuator rod to save my gearbox by the previous owner. Apparently it put out 505BHP & was running over 2.3 bar on the rollers before I owned the car but the gearbox only lasted 7 miles!!!!
This is only what I was told so can't confirm 100%.
It was also apparently live mapped by Ahmed Bayjoo and I have no reason to doubt this because it usually drives sweet as a nut.