I dont know. We dont have many "loud" systems around here. There is however, ALOT of rednecks with straightpipes. My good friend Jake got some duals on his dodge, we were drivin through the square one night and he set off car alarms on the other side, (bout 75yards) Myself and a few other guys have some pretty loud trucks too, but none of us ever get pulled over. I agree..its bs.