I own an Infiniti G35 coupe and Chevy Cavalier (with mods) and the other night was pulled over by State Police (Chicago burbs), which told me the reason they pulled me over was for a loud muffler. I have an AEM exhaust, but have never had any problems with the law for it over the past year. I has asked the officer some questions about aftermarket parts, but he was useless. Anyways, are Borla or any other aftermarket exhausts illegal, or has anyone gotten a ticket for noise pollution??