they have also had them linked to the tuner that made the F50 bi-turbo
www.koenig-specials.com i think
the story goes that the car was 'only' making about 850 hp... but there was so much torque on hand that it was impossible to full throttle the car until partway through 3rd gear... they also suggest a sub 10 second 1/4 time, and better brakes... suspension work...
http://www.koenig-specials.com/ferrari/ferrari-f50.html