They make prep that has no smell, only way to tell is test them which cost money, in turn makes the class cost more to run, which in turn might as well run a regular class. To me you want a cheap class and well way you are looking for tires to run and so forth, be cheaper for you to run the regular class. To me if was to run grooves and could afford it, I’d have a new set every other weekend because fresh rubber is always faster. And that me not “prepping” . Dnq is just a series, if you want to see professional racing then should venture out to beaver creek, talladega, and other tracks. We have to because acadiana closed down and only option left is mojave but now we will have Battle Creek as an option. We tried the box stock rules years ago with a sealed motor and there still way around it to cheat