yes.... its kinda obvious your not clear about the rule book in nascar. There are diff clearances for diff makes.. if all the cars were stock.. there would be no race at all... afterall it is "stock car racing"... well thats what it started out as... Now if you go to a superspeed way ford has to have 1 set of rules.. and chevys have a diff set.. and then the dodges have yet another set.. if they all went by the same rules... nascar would be so boring not 1 would watch, and no money would be made.... If you want to watch racing.. go to a local sat night dirt track or somthing....