zTraxxas 5191X - 4-Wheel Drive Upgrade Kit (Includes All Parts To Add 4W by Traxxas $99.90 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart Traxxas 5191X - 4-Wheel Drive Upgrade Kit (Includes All Parts To Add 4WBrand: TraxxasPart Number: 5191XReplacement or upgrade part for these Traxxas models: