The MHR Replica is a 70cc aluminum racing cylinder , which can be compared with the performance of the Polini Corsa . Since the MHR Replica is made of aluminum as opposed to the Corsa , the Malossi has the much better thermal properties . Aluminum conducts heat better than cast iron . The hard chrome Nickel-Karbon-Siliziumlaufbahn ensures a long life. In order to ensure the internal cooling and to obtain a good power efficiency , should be at least a 17.5 mm gasifiers . On this cylinder , it is recommended to build in the exhaust Stage6 Pro or the Nardo of top performances . The Yasuni C16 turns over from far , but has not as good peaks . Comparison numbers: Neu & Originalverpackt.