The highest degree of evolution of TOP PERFORMANCES. After the DuePlus still built of cast iron, the Top, with the TPR series, decided to bring aluminum racing cylinders to the market. In water-cooled models, the modular head of the Due+ was used. From a performance point of view, you can classify the TPR cylinders equipped with a split exhaust, in the upper Midrace level from 10 to 14 hp.