The O.S. Speed B21 Ronda Drake Edition 2 engine is a further refinement of the previous model. It is based on the B21 Adam Drake (same specifications as the Adam Drake 3 .21 Buggy Engine) and features a new pink cooling head and pink carburettor restrictors which are unique to complement Ronda's signature colours and style. Ronda Drake is the wife of Adam Drake and has over 30 years of remote-control racing experience herself. It’s an excellent choice for both buggy and truck racing as it provides a linear power band, exceptional fuel mileage and tons of overall power. By adopting a boost bypass processing for the crankcase, the engine runs more smoothly making it even easier to drive and handle. The new design is used to reduce weight and lower the centre of gravity and improve driving performance.