The activity is concerned with the processes of preparation and modifications of the external or internal shape of the passenger cars to become according to the customer's desire and requirements and also to upgrade the performance of the car in aspects related to reducing fuel consumption and increasing the capacity of the engine and transmission box, modification of the external shape includes modification and addition of parts that change the air dynamics that are exposed to the vehicle such as side margins, front and rear bumpers, rear wings, the interior includes audio systems and air conditioners, as well as preparing and modifying commercial vehicles for other purposes such as selling food, ambulance, concrete-mixers, ...etc
