Thoughts:
#1. These law makers are idiots.
#2. The loudest vehicles by far are diesel (read comercial) trucks & Harley motorcycles. I assume both are exempt.
#3. A V6 or V8 engine with a turbo type muffer should not raise anyones eye brows in terms of noise.
#4. How far back does this go? If you had it last year are you grandfathered in? Or if you own a car from the 50s or 60s are you exempt since your exempt from emissions?
#5. They should have just passed a law that said no Hondas, Toyotas, or other 4-cyl *hit box's can have a louder than stock exhaust. That's to the point.
#6. How is a inspection person supposed to know stock with out a decibel meter? That leaves it open to opinion of some frustrated inspector with an axe to grind.