Ultima RB7

R246-8861 Pro Spec Capacitor Stock (13.5-21.5T)High-capacity capacitor that temporarily charges excessive power from the battery and discharges it for faster acceleration. This "Stock" type is ideal for 13.5T to 21.5T brushless stock motors. 

UMW602B Ball Diff. Set for Ultima / Scorpion

UMW748 Short Steel Diff. Shaft Set(RB7SS)Short steel diff shaft set for low to mid grip surfaces. Can be used with RB7SS stock inD/inD setup (Rear short arm with wide hubs and long axle).

UMW751 Battery Weight(32g/RB7/RB7SS)32g battery weight for RB7 / SS.Weight to put under the battery.Adjusts the weight balance when using a short STD size or short LCG size LiPo battery.