I Would like some info on gas RC cars?

I met this kid once that had a hobby of RC cars that had motors and run on gas. The particular one he had could go 55 mph.

I was just curious as to how i would get started and how much this stuff cost ( i know its not cheap)

also if you could provide a link that would be great.

Any info is appreciated,
Thanks

http://www.google.com/search?q=gas+powered+rc+cars&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-US:official&client=firefox-a