New parts can be created by combining 2 or more existing parts. The more parts you combine, the better your chance of receiving a higher quality part.
Combining unique parts will yield higher quality parts.
When three of the same part are used your chances of obtaining a higher level part greatly increase .
◎Special Parts From The Designated Area
When special parts from the same designated area are used in the combining process, the chance to earn a new part belonging to the same designated area increases. This does not apply if the car is for both onroad and offroad
◎When identical parts are being used, then the influence of using the parts from the same designated area is not affected.