O.S Speed 21XZ-B buggy engine

O.S Speed have released the next incarnation of their World Championship winning buggy engine with the release of the 21XZ-B. This 3-port engine features smoother power delivery and an 8% improvement in fuel efficiency. The motor sports a new hardened and lightened crankshaft that uses tungsten weights for balancing, and this is mounted inside ceramic bearings for reduced rolling resistance. The cooling head has also received some attention, being lowered by 9mm and lightened through the use of holes to help lower its centre of gravity.

Source: O.S. Speed [osspeed.com]