This is a Subaru WRX STI style 18 scale 4WD 2 SPEED Nitro Gas Powered. The Car comes with a 4WD Engine complete kit with body and a 2 CH Pistol Remote Control with 2 Servos The car has a Solid Aluminum Chassis The car is 100 assembled and ready to race right out of the box. The car is 80 part compatibility and modification with other brands such as Traxxas HPI and etc. You can change the body kit into car shells You can upgrademodify the engine. You can also add new tires suspension and more The manufacturer refers to this car as a 18 scale when it is actually closer to a 17 scale.