Before you make any modifications to your car, you should check with your local Driver and Vehicle Agency to ensure they are legal. Some changes are not allowed, and some are not allowed at all. In addition,one motoring: some types of cars are illegal in some states. You should always be aware of these rules, and make sure you're aware of any legal restrictions before you install them. For instance, some car types and parts are illegal.
Depending on your state laws, you can make any modifications you want. Some car modifications, such as superchargers and turbochargers, may not be legal. These modifications can increase the performance of your car without violating the laws. If you don't want to break the law, you can add a turbo or supercharger to your vehicle. These are legal performance modifications and will not affect your vehicle's emissions.
If you are wondering what car modifications are legal, remember that some are not. Some modifications are too extreme, and you might be breaking the law if you do so. Some states restrict certain modifications. Fortunately, there are many legal modifications that can improve a vehicle's performance and appearance. Just make sure you get professional help when making the modifications. And remember, your car's MOT may fail if the modified part is illegal.