HPI RTR Nitro RS4 Chassis: 0.098" (2.5mm) 6061 aluminum, purple in color. Drive: Four wheel shaft drive. Engine: Nitro Star G3.0 3.0cc (.18 cu in) 2.2hp Roto-Start compatible can be bump started in racing applications, ABC cylinder and liner construction-"A"luminum piston,"B"rass cylinder liner that is "C"hrome plated, lightweight aluminum con rod, 2 needle 6.5mm rotary carburetor, 2 stage air filter, HPI Roto-Start electric starter. Exhaust: Dual chamber aluminum tuned pipe with tube header, black in color. Radio: Two channel 27MHz AM with steering and throttle trims, dual rate for steering and charge jack for optional NiCd battery. Servos: Two standard size and torque. Fuel Tank: 2.53oz (75cc), flip top cap. Clutch: 2-shoe. Transmission: Two-speed, adjustable. Ball Bearings: 18 rubber sealed. Shocks: Four oil-filled, with coil-over spring. Main Gear: 47 and 43 tooth composite construction main gears. Clutch bell: 22 teeth and 18 teeth gears that thread onto clutch bell. Gearbox: Sealed, front and rear. Differentials: Sealed, with metal bevel gears, limited slip front differential. Brakes: Single disc, fiber construction. Tires: D compound X-pattern 1.02" (26mm) wide, 2.5" (65mm) diameter. Wheels: Six-spoke bronze in color 1.02" (26mm) wide, 2" (51mm) diameter. Body: Pre-painted and trimmed with rear wing and decals applied. Bumper: Front foam. Suspension: Four wheel independent. Caster: Adjustable, caster/toe-in refers to the angle of the front suspension when viewed from the side of the car in relation to the chassis. Camber: Adjustable, camber refers to the angle of the tops of the tires from vertical when viewed from front or behind vehicle. Steering: Bellcrank. Servo Saver: Included. This product includes, HPI RS4 3 Evo+ oil-filled shocks, tuned pipe, 3.0cc engine, trimmed and painted polycarbonate body, tires, foam inserts, wheels, decals AM 27MHz 2-ch radio, Roto-Start and instructions.