noise doesnt get people defected! illegal mods do! SUCH AS AN EXHAUST BEING TOO LOUD!!!! and how the hell u rekon they can defect u for that if they put freaking ear plug in!!!! DUH!!!!!!!!!!! illegal mods cause symptoms, eg. NOISE!!!!!! and as far as noise not causing defects how cum they test your car with a decible meter to make sure nothing exceeds 98 deibles (I think that's the right number)???? the reason a vented after market bov (is the one that makes noise) is illegal is coz the standard bov is plumbed back to intake, however the others are exhausted to atmosphere. anything after the intake on a car is classed as intake gasses,(then changing to exhaust gasses) and not allowed to escape to atmosphere until it reaches the tip of your exhaust! THE NOISE IS A TELL TALE SIGN U HAVE AN AFTER MARKET VENTED BOV! that's WHY IT'S ILLEGAL.... dunn what its like over there... but its a big reason cops pull people over here...when they hear a big tshhhhhh there you go, a shared a little bit of my knowledge with you all...