For those of you who are wondering what the RPM act is this will explain it
https://www.sema.org/epa-news

And yes some states have began adopting the no mod rule. I have a good friend in Oklahoma who is a tuner. He can tune just about any vehicle with the OBDII port to get sometimes double the horse power at the same time double the fuel mileage without compromising the emissions level often times improving the emissions.
But he can also go the other way and turn suburban sally's family 2 ltr taxi into a tire shredding 1/8 mile contender.
His main worries are his talents are fast becoming a target of the knot heads in DC.