The most efficient engine in the world. Reds Racing is happy to announce that the new 721 Scuderia Pro off-road engine is now available. The new 721 Scuderia Pro is a limited edition of just 300 pieces, our main objective was to develop a fast and reliable engine able to guarantee great fuel economy (over 9 min) and incredible power at the same time! What’s New? - All-New 3 needle Carburetor for great reliability and tuning stability. The new carburetor guarantees better and