BMW M3 CSL on track video

I've seen this before. This guy drives kind of funny, he must still be getting used to the car. I get a good chuckle out of each time he gets stuck exiting in too low of a gear. Does anyone know if the stock CSL really sounds as loud and raucous as this? or are there mods at play?

1st off, my dad is the owner of the CSL but i do get to drive it so it is sort of the car i drive!

Anyway, i can say this CSL sounds exactly like the one i drive most weekends (it is completely stock) and sometimes yeh, he is coming out of corners in the wrong gear but i can say he drives it well, you can exit corners at low revs in a low gear and it will still catapult you at the horizon just not as fast!

Also, this guy must hold a race licence as there is no way that thing is limited to 155 mph.