This is footage from a recent Ferrari client car track day at Monza. The client car program is where select Ferrari owners purchase race cars based on production cars that Ferrari keeps and maintains. Track days such as this one are the only time these cars are driven. There were a handful of  the Enzo based FXX’s present. The FXX has a 6.0 liter V12 that makes 800 horsepower at an astronomical 8500 rpm. Very few engines have the kind of response like the one in the FXX and most of those are rotaries. It almost sounds like engine note can’t keep up how fast it revs. All of the downshifts fire off like lightning and the throttle blips sound like they would continue to rev forever if the gear engagement didn’t stop it.

The 599XX has a different 6.0 liter V12. It’s far less high strung making “only” 740 hp. These cars are based off of the 599 GTO and have an active rear wing as part of the Evolution aero package.

Source: Youtube user NM2255