I have to say that is absolutely fantastic, really adds to the authenticity of the game. I have no idea how you made that, but I am in awe. Like others have mentioned, is there any way you could take orders for some of these? There is certainly money to be made out them.
There is a niggle I have though... the way the needle on the rev counter goes beyond the 8,000rpm limit, into no mans land. I understand that's a difficult one to get round, as the different cars in the game have varying limits. Could you get a rev counter with a higher limit, say 10,000 or 12,000rpm to support more cars? I love how you've included shift lights, indicators, fullbeam, low fuel and pit speed limiter lights in the dash as well though, that's absolutely great!
Here is a link to the latest video of the website if you're interested.
http://www.youtube.com/watch?v=VGn4ylV7Guo