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Rolling coal occurs when black smoke flows from the exhaust system of a diesel. Rolling coal is obtained when a diesel vehicle has installed a stop mechanism to fool the emissions test. According to the EPA, it`s super illegal and it`s a huge penalty if you get caught. Radar detectors are not always technically illegal. Federal law makes it illegal to use a radar detector in all 50 states for any commercial vehicle, but according to Motor1, the only state laws banning radar detectors are Virginia and Washington DC. It also states that 28 of the 50 states prohibit the mounting of elements on the windshield. Radar jammers are a completely different technology that uses a radar gun to impair a vehicle`s ability to read the speed, and in more and more states, nitrous is being used illegally in cars as a power amplifier. While it is not illegal to have nitrous oxide in your vehicle, it is illegal to use it on the road and is sold with the intention of being used only for off-road purposes. State laws vary, some are clearer than others.

According to Super Chevy, there is an exception in Maryland that protects drivers who drive their vehicles to and from the track with NOS. According to Hot Rod, cutouts are more fun, but there was some gain when the test bench increased power and torque by less than 10 each when tested on a GTO `67. Either way, they are illegal because of the increased noise your exhaust system will make. Strobe brake lights are very common on motorcycles that are used more as a safety mechanism, but increasingly appear in the tuner scene as a vanity modification. A strobe brake light is obtained when a module is wired into the vehicle`s brake light system, which actuates the brake flash several times before adjusting to a solid brake light. According to Popular Mechanics, it`s illegal to have flashing or strobe lights on your vehicles, except for your signals. Headers aren`t illegal, but long tube heads on the other hand are a slightly different story. Not only will they make your vehicle noisier, but it will also be considered a manipulation of your vehicle`s emissions, which is illegal under federal law, according to the EPA. Essentially, this means that many of the exhaust system changes that are often made to sports or racing cars can be considered illegal. When installing replacement exhaust modifications, make sure they do not make excessive noise.

The oil shortage in the early 70s led to the Clean Air Act, when muscle cars massively reduced their performance thanks to catalytic converters and out of tune engines designed to reduce smog and improve air quality. Any type of alteration of a vehicle`s catalytic converter, including removal or tampering, is protected by federal law. Many heavily modified vehicles have removed their cats without any problems, and here are 19 other mods that are illegal, but most drivers have probably gotten away with it. We do not recommend making illegal automods for use on the roads, but rather ask everyone to check their local, state, and federal regulations to ensure compliance. It is ignited by the hot pipes, which causes flames to erupt from the car`s exhaust. How does the fuel manage to get into the exhaust system? According to Car Throttle, this is usually due to the removal of the catalytic converter and the addition of straight pipes, so you guessed it; illegal. Other ways to create a flame exhaust include installing a spark plug in the exhaust, purchasing a flamethrower kit, installing an anti-offset, spoiling the air-to-fuel ratio, or simply adjusting the ECU. A straight pipe is just that, a pipe that, unlike standard exhaust systems, is straight and without restrictions. There are several reasons why it is illegal. The first is obvious for noise regulation. The second is emissions, which are more difficult to circumvent in some states because they have to be reviewed annually to pass the inspection and register or insure your vehicle.

According to New York`s auto laws, a vehicle must have a proper muffler and exhaust system, which makes straight pipes illegal. Adding colorful lights to vehicles became very popular after the movie “The Fast And The Furious”. According to Find Law, it is legal in some states to have too few incandescent lights until they are visible or strobe. While state laws vary, according to Extreme Tactical Dynamics, vehicles other than emergency responders are not allowed to have flashing red or blue lights. Some state laws prohibit all colored lights anywhere on a vehicle. Aftermarket racing seats and belts are becoming a popular mod on the automotive scene. The main thing is; They are illegal. There are also several reasons for this. Vehicle modification, whether mods are legal or not, has always been popular among transmissions.

Many people assume that if they can buy a part in a spare store, it is legal to put a car for use on the street. However, in most cases, it turns out that this new toy is not legal for use on the street. Companies get away with printing “just for off-road use” in a normally very small and discreet place on the packaging. Many laws vary from state to state, with California and New York city known to be notoriously tough on their emissions laws. When it comes to changing your suspensions, whether you`re lifting or lowering, there`s a limit to the height or drop you can reach. Each state has its own laws that limit both, but most have different laws that restrict height restrictions on bumpers and headlights that would make the extreme cases of both illegal. Under elevator laws, NJ limits the amount you can lift your vehicle based on weight and requires all lifted vehicles to receive a “high vehicle approval certificate.” The state of Georgia allows you to legally elevate your vehicle up to two inches. Nowadays, at an auto show, you can always find or better hear an old hot rod with open headers.

What are “open headers”? It is easy if there is no pipe after the header, so no exhaust system; therefore illegal. In addition to the vehicle`s emissions, the exhaust will be ridiculously noisy, not to mention the smell won`t be good either, as your vehicle will emit the exhaust gases closer to where the driver is sitting. Catalytic converters were manufactured in the 70s to reduce the amount of smog produced by vehicles. According to How Stuff Works, the catalytic converter is designed to convert vapors into a harmless product. Removing the catalytic converter from a vehicle is one of the easiest ways to get power and better exhaust sound, but it is also very illegal as it is illegal under federal law to remove or manipulate it. A vehicle that requires an annual emissions test could not pass if its cats have been tampered with or removed. As for the legality of tires, it varies from state to state. According to It Still Runs, in 49 states, with the exception of Kentucky, it is illegal to have tires that protrude beyond the wings of your vehicle. Hard to believe with the latest trend of position trucks? The engine setting is more like hacking into your car`s computer.

Nowadays, all new cars have computers, and according to Wired.com, the software of each vehicle has a copyright and will always belong to the car manufacturers.