These extended rear drive cups are engineered exclusively for use with the combination of Traxxas steel constant-velocity driveshafts 5451R and the adjustable wheelbase rear suspension arm set 5333R) on Revo®. These extended drive cups help keep the shafts securely in place throughout the huge range of suspension movement allowed by the adjustable wheelbase suspension arms. These drive cups should not be used with standard wheelbase rear suspension arms.
