From the Manufacturer HPI specializes in the kit - type Rc car or truck, which can come already assembled or in kit form, meaning you build it yourself or with a friend While the kit Rc cars and trucks cost more at first, they are more durable and faster than toy Rc cars You can also repair this type of Rc car or truck, which is usually impossible or very difficult to do with toy Rc cars The cost to repair a car or truck is only a fraction of the cost it would take to send a toy - style kit to its manufacturer (if that is even possible) You can also upgrade an Rc car or truck to make it faster, stronger, more durable, more adjustable or just make it look nicer All HPI Rc car and truck kits have optional bodies that you can replace whenever you want, meaning while you may have a street car today, you can have a street truck tomorrow, or a sedan, racing coupe, sports car, or nearly any other type of car you desire