Available now from HPI Racing are Heavy Duty Drive Shafts for the Baja 5B! Thicker and tougher than the stock drive shafts, these are the perfect upgrade for Baja 5B owners who are modifying motors and or pushing the performance envelope. 15 x 120mm. Includes: HEAVY DUTY DOGBONES (2) & AXLE BOOTS 22x47mm (4). HPI part # 86610.