for a 2.5 class i say let them cut off the intake for portwork only. state in the rules when plenum is reattached that it has to be a shelf or "stock style" log intake. individual runners should not be allowed in my personal opinion. the 2.6 class is pretty much legal to run anything so keep the 2.5 class conservative so people can tell the difference in classes. if you let it get out of control ex: hood stacks, IR, water air coolers, and extra weight, people wont be able to tell the difference in classes IMO and that takes away from the whole point of having another charger limited class. if you let them get away with runners ect. you may as well just run a 2.6 class. just my
. i'm not a truck puller so my opinion isnt worth much but i am around it continuously and understand what these rules are made for.