and you were doing 25? NO exhaust sold is loud enough at that speed, unless you're coasting in 1st, I think the dude was just a douchebag.

ask him what the decibal noise level is for illegal and then ask him to test yours.

I asked that also.. But the cop said " it doesn't matter becuase ur car has aftermarket exhaust which is illegal. You see that big coffee can? That meNs it's not stock that's y i made u to stop." and " if your car is Ferrari or mustang and makes loud noise,Then I didn't pull u over. Press the gas a little bit". I pushed it. He goes " wow..that's why I keep telling u it's illegal. Let me have ur license and registration."
WTF....

is he a forum member at my350z.com?

They seem to hate the 370z there.

Wow, I would have said "Are you done? Because I have to get to the shop to have my NOS and roll cage installed." I'm not a wise *** with cops but this guy obviously has a hard-on against stereotypical "ricers". He's classifying you as one, and you sound like a younger kid (no offense if you're not). I went through the same **** back in the day with my 300ZX. Cops can bully you around when you're young and don't know your rights. I would just tell him if he writes you a ticket that you will make a fool of him when you take him to trial and question him about his belief on aftermarket parts and the law... He will look like an incompetent bozo in front of the judge and entire court. That's pure BS.

Keep it cool in that neighborhood because you're marked now. And any visible and audible mods you do now will only bring more of the same nonsense.

He didn't write the ticket because he knew he was wrong. He was fishing for a bigger bust.

I do believe in some areas cops will write shaddy tickets, betting that you don't have the time to go to court twice just to fight them.

I agree Lemers. But I'm a stubborn bastard and I'll go to court when I know I'm right!

In most states, all aftermarket parts that have to do with emissions are illegal if they don't have a CARB certification.

Other modifications might be illegal too, for example ride height.

Ok show a law that says afermarket exausts in themselves are illegal. The laws are most likely written to outlaw higher emission levels and noise levels. Neither of these can be proven on the street by a cop by looking at your exaust.

I'm not going to get in a discussion with you, the law is different in every state.

However the cop don't need to prove nothing, you are the one that will need to do it in court. ;)

Look at the laws in your state!

It does not matter what state you are in the Constitution garuntees certain rights one is the pursumption of innocence or "innocent until proven guilty". Even if the cop writes a ticket he has to site which law he believes you broke. You then you go and plead. This is your choice not the states. If you plead not guilty than it may go to trial if the judge feels tha the state has enough evidence connecting you to a crime (speeding case it's varified by radar usually).

Also a law outlawing "aftermarket" parts or "modifying" a car is hard to write. It is a modification to the car if I use a different oil filter or brake pads than the OEM. That's why states don't outlaw "aftermarket" items. Doing so would put autozone and pepboys out of buisness and force car buyers into monoplized car maintenance through Nissan dealers.

No what states do is enforce certain legal standards. Like emissions, noise, ride high, even brightness of headlights and taillights. If you get a ticket for "noise" most likely the cop has been trained on hearing the exhaust from a certain distance. And that will be his testimony. You get a chance to dispute his testimony with what ever evidence you have. The best would be proof that it isn't louder than legal limits or it could be that see just saw an "aftermarket" exhaust and was picking on you. The verdict will condown to "reasonable doubt".

Again you seem pretty certain that "most states" outlaw aftermarket parts. I just ask you to show me one.

JB1 was pulled over and ticketed for a Berk CBE and HFCs. His mistake is that when the cop asked "is this exhaust stock?" he said "no".

As others have said I think that cop was fckin' with you. Was he in a marked car because hes actions sound almost as immature as if a wana-be fake cop pulled you over for the powertrip. I wouldn't be concered in the future about getting pulled over just for your exhaust, unless you put something really nuts on.

do mustangs have exemptions from the law?

nailed it.

Again every state has different laws plus you also have local codes. However you want to make a big issue with me about this.

I know some of the laws of the state and local county I'm currently living in, if not I will research. ;)

You can check your own laws or requirements in your current state! :google:

But I also agree that the cops can be a$$holes and prejudice with some cars when it comes to aftermarket parts depending of the state or county they are in, take for example California.