HPI Racing Roto Start System (HPI S21, S25, RB Concept TM728, TM928)
This is the HPI Roto Start System Shaft Drive Starter from HPI Racing. This version comes with the back plate that works with HPI's S21 and S25 series of engines, such as the engines found in the original Savage 21 and 25 monster trucks. This will also work with the roto start versions of the RB Concept TM728 and TM928 monster truck engines.
This product was added to our catalog on August 8, 2006.