i have a full custom HKS exhaust and a high flow cat, and its very very loud, i got a ticket for it, went to court and beat the sh!t out the cop, got the ticket stamped by the judge, next time i get pulled over and the cop thinks hes got another one, BAM in his face! Stamped ticket saying my exhuast is legal. i will never forget te cops face after the court case, he couldnt even make eye contact with me, so now instead of worrying bout getting pulled over, i welcome it. cant wait to get pulled over again!!!! o yeah the cops excuse for writing me the ticket was and i quote " the state officer told me to do it" hahahha he was a Fairfax County cop on duty with a State cop. LOSERS!!!!!!!!!!!!