In this video, a Corvette Z06 C6 races a Nissan GT-R on the freeway. I don’t know if both cars are modified or not, but from the looks of the other cars in the video, it does look like they are with a Corvette C5 and a Subaru WRX, so likely these guys aren’t stock.
It’s an impressive video, but with the extremely high speeds on public roads, it’s extremely dangerous what they’re doing.