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20 Insane Car Mods That Are Illegal In The United States

Cameron EittreimAugust 23, 2021

Photo Credit: DUB

6: Sound System

This entry should be without question because we’ve all heard those obscenely loud sound systems that go up and down the neighborhood. Most custom sound systems are illegal for the simple fact that they emit a sound that is higher than the noise ordinance. Most police officers will pull you over and give you a noise violation for that alone.

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But if you rack up too many of these noise violations, you’re going to get hit with a pretty hefty fine and eventually get your car impounded. A high-quality sound system can be great if you spend a lot of time on your ride, but taking it overboard just isn’t recommended.

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5: Colored Lights

Colored headlights have been coming into their own lately, whether powered by an app or a switch you can change the colors of these lights. Unfortunately on most mainstream roads, this is an illegal thing to do, and with good reason. You aren’t going to be able to maintain visibility on a dark road with a pair of red headlights.

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Most of the drivers that do these custom light setups aren’t thinking about the bigger picture. Adding colored lights to your vehicle isn’t easy, there will be a lot of re-wiring that needs to be done, and after that, there are still shorts that can happen.

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4: Oversized Tires

Just like racing slicks are illegal on the streets so are oversized tires. If you’ve ever dreamed about slapping some tractor tires on your ride, you’d better keep dreaming. In most states, the size of your tires is greatly determined by the other size aspects of your vehicle. In Ohio, the size of the tire is dictated by the height of the vehicle.

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Most police know to look out for tires that don’t belong on a vehicle and you will get pulled over for it. There have been plenty of YouTube videos where obscene wheels have been put onto a vehicle, but this is far from being legal.

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3: Radar Detectors

The police clearly don’t want you to know that they are tracking your speed. This is why radar detectors are illegal and there is no legality to using one. You might think that you are getting away with speeding but most cops have upgraded their own tools to detect radar detection systems in cars.

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Needless to say, you are probably going to be pulled over and the confrontation probably isn’t going to be too nice. The rise of radar detectors was once a popular subject, but nowadays most police are hip to drivers doing this method.

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2: Rolling Coal

There is no doubt that you’ve missed those lifted 4X4 trucks spewing black smoke all over the road. This is a term that’s dubbed “rolling coal” and it’s illegal in most states. The black smoke chips that we covered earlier in the article are only a small portion of the problem. Some older diesel trucks just spew black smoke naturally and the owners do this on purpose.

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There are many instances where rolling coal has caused a road rage incident between two or more drivers. The end result is never pretty and you can bet that you’ll have a lot of issues when it comes to rolling coal. Rolling coal might seem like fun but the negative impact on your wallet won’t be.

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1: Catalytic Converter Delete

Catalytic converters are an important part of the emissions system that’s put into your vehicle. If you bypass this system you are going to be in trouble with the smog authorities in your state. Nevertheless, many people tend to find a way to cut out or bypass this system to increase the performance or the sound of their vehicle.

Photo Credit: Boss Exhaust

There is no right way to do this, and most automakers have installed computer systems that let the vehicle know when the airflow just isn’t right. When you remove a catalytic converter you are removing an important part of the vehicle, and this usually won’t work out.

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