Enforcement will be tough. Back in 78 my bro bought a Z28 brand new. They pulled him over for lack of a front plate(required in WI) and while he was stopped the cop says"thing's kinda loud too" My brother said" Not sure what ya mean...it has 200 miles on it....if it's too loud you should talk to Chevrolet" lol Cop let him go. This is a huge unenforceable can of worms. They going after Harleys too?