M3 modified cars are a type of vehicle that have been modified to enhance performance and style. These cars are typically based on the BMW M3 model, but can also be based on other BMW models. They are usually modified with aftermarket parts such as engine upgrades, suspension modifications, body kits, and custom wheels. These modifications can increase the power output of the engine, improve the handling of the car, and give it a more aggressive look. M3 modified cars are popular among car enthusiasts and are often used for racing and drifting.