At least, that's what the folks over at Mustang6G say about this heavily disguised pre-production mule caught on video as it blasts around some public roads. I could not agree with their assessment any more.
Actually, it's tricky to know exactly what this thing is. It could be the GT350, the GT500, or something else we don't know about.
It looks to be the same prototype that showed up in photos last week over at Mustang6G. It sounds considerably more insane than the standard V8 GT, so it's probably a safe bet that it's some high-powered special edition.