OS Engines O.S. Max 91Rz-H Dh Ring

Technically identical to the superb 91RZ-H, but with the added convenience of a cast cylinder head that makes this engine perfect for use with scale type machines such as those available from Hirobo. This beautifully manufactured engine shares all of the advantages of its stablemates, smooth controllable power, exceptional throttle response, and immense torque. Legendary O.S reliability comes as standard.