aspirated, the engine made 490 rear-wheel horsepower and 494 foot-pounds of rear-wheel torque.
  The stock Z06 had merely been Gottschalk’s starting point. He sent the 2001 coupe to Agostino Racing Engines in Peckering, Ontario, Canada. Nick Agostino stroked the LS6 to Andy’s extremes.
  The broker rattled off the hard numbers. "With the supercharger, we pulled 697 at the rear wheels and 710 foot-pounds of torque. And the car will still get 26.5 mpg running