Lamborghini Superleggera LOUD Sounds! - Rev and Accelerations

I have filmed a friend's black Lamborghini Gallardo Superleggera. The car is fitted with Bartoli exhaust system, it does a few loud revs and then you can see it making a series of incredibly loud and fast fly bys and downshifts at the Monza racetrack. I don't know why, but he decided not to put on this Lambo the spoiler, it's the only one Superleggera i have ever seen without it. Those fly bys were around 285km/h.