Kirk M. White Daytona footage?

I got quite a few photos of the Kirk 365 GTB 4 Daytona and the 512 M Cartolina, but no video. I was at Cavallino the last two days shooting and fell in love today with the Kirk M. White blue Daytona. When I first heard the car screaming down the back back and had no visual of it, I told my buddy "Hey this sounds like a F12, get your camera ready!" And it wasn't . Can anyone tell me more about this car , this specific one and the engine, and why and how it makes that gorgeous sound. I assume its not a factory motor and or exhaust? Please anyone with info or a video clip of the car doing justice to it's sound, please post.

http://i1348.photobucket.com/albums/p727/volkscedes/DSC_2059_zps567c8dfa.jpg