Mazda touring race cars

I was watching the Touring car race series on speed, and i was wondering where i could get info on the cars there because the Mazda6's on there were sweet. there were also Acura Tsx's and Bmw 325's and Audi A4's and other cars too. very nice vehicles and i wanted to see if anyone knew where to find info on these cars and the specs and what not?

Here are some links...

http://forum.mazda6tech.com/viewtopic.php?t=2668&highlight=altenburg

http://www.awrracing.com/protomotive/index.html

http://www.tripointengineering.com/index.php?osCsid=c67abce1f0ddaac018111d59cecd3162 - this is the home site for the blue and white mazda 6's

http://www.realtimerl.com/ - this is the site for the acura

http://bimmerworld.com/ - this is a site for the bmw