GM released a video of the 2009 Corvette ZR1 on the famed Nurburgring yesterday. The video shows the ZR1 completing a lap around the track in 7:24:6, which officially beats the time of 7:29 that was set by the Nissan GT-R.

The ZR1's video has raised quite a few questions about the validity of the track time. There have also been rumors that both automakers by using racing fuel and other modifications, even though GM claims that the ZR1 was stock.

The guys over at Garage419 created a side by side video to try to answer some questions that have been raised. Both cars start at different points on the track so the Garage419 guys used the pit-exit sign as a visual landmark.