See: 6MIK

6mik have introduced new Optima’s rear engine cover for the O.S. 21 XZ, B2101 and B2102 engines. Thanks to exclusiv internal channels, the rear cover will increased engine efficiency by feeding optimaly lateral ports. The fuel mixture is actually less melt by the conrod movement. Following the track conditions, the torque can be increased about 20% and the refuel about 30 seconds. Also allows faster idle stage return. The rear engine cover comes in red anodised aluminium.