More vid! For the downshifting sound, that sounds like a backfire check out 2:00 and 3:11 specifically. They are loud pops, and the audio has a hard time bringing them through clear, but you should get the idea. GoPro.
I also eyeballed 0-110mph (speed at top of 4th per HUD) in about 12 seconds. Not official or anything, but sounds pretty solid to me!
Closed course.... etc.