There has been debate on how many mods to a car ie: floormats. chrome intake, pullies, billet parts in the engine bay, to the interior, on and on. How many should there be to change a car that is in stock category, to a mod? The last show that i went to, the club running the show, decided that 5 modifications that were visible would keep the car stock, over 5 the car is classed to modified. Other car shows have more and some have less. But like others have said, it's up the who is running the show to control this.