Tips on Modified Cars You may decide to tune the car to fit a particular description, or purchase a vehicle that is already modified. Tuning cars tips can be grouped into various categories. The most popular include the following. Custom Car tuning means, a customer can today afford to be choosy when purchasing a car. Car Tuning making torque cars is a modification carried out with the aim of enhancing the vehicle's performance. When it comes to car tuning, you can choose to tune your suspensions or even the engine.