He has the same exact race but from inside the mustang, note the ZR1 badge and the ridiculous turbo spool. Does that help?
https://www.youtube.com/watch?v=pdOnjITN9lc
I think you could do a turbo kit on something like the 5.0 for about 10k, but at these power levels he may have a fully built motor which would be much more expensive that that all wrapped up. EDIT: Description says 7 psi... so probably it's a stock motor
There's nothing super impressive about the video, it's actually rather slow for a turbo V8, I just loved it for the people in the ZR1's reaction. Must be a humbling experience when you've got a $100k+ car to get beat by a "pony car"
RE-EDIT: Here you go Arkaign, There's a 67mm turbo kit out there for about $7k, I'm sure you could get it installed and tuned for under $3k. Just as long as you're fine with throwing any semblance of a warranty on a brand new mustang out the window.
http://www.lethalperformance.com/20...-2011-2012-mustang-5-0l-single-turbo-kit.html