There are links to all the tracks, which there you can check out ticket information race schedules and all the teams. This site has all of the Nascar items to purchase locally and is where I go to get hats Shirts and other things about Nascar. This site is partial to Ford Motor Company. You can join Team Ford Racing to get the full benefits. Also has link to site below.
Site has links to build a vehicle and actually purchase online.
This site is the same link but on the Ford Motor Company site.