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HPI Racing Roto Start Back Plate Unit Set For Nitro Star K Series w/ Pullstart #87127
This is the HPI Roto Start System Shaft Drive Starter back plate from HPI Racing. This back plate works with HPI's K series of engines, such as the K4.6 found on the Savage SS .28 monster truck. This will also work with the new Racer's Edge Sure Fire .32 monster truck engine so you can drop it into your Savage and start it with a roto start instead of a pull start.