MRZ-Pro-Kit Atomic MRZ Pro 2wd Chassis Kit (No Electronic) MRZ-Pro-Kit Atomic MRZ Pro 2wd Chassis Kit (No Electronic) MRZ Pro features a revolution rear motor pod which allow toe angle adjustment for the rear wheels. with the aid of the toe-in angle, the rear traction of the car is dramatically increased. You will be amazed how stable it drives and you can accelerate the car like 4wd.MRZ pro kit come with-- Front and Rear aluminum knuckle- New light weight and low CG battery mount- Aluminium Rear motor pod- Aluminium Dust Guard Ball Differential.- Brass Chassis plate (35 gram)- Turnbuckles for quick adjustment of Rear Toe Angle. (description exceeds maximum possible length)