"Booster" Rear Cover for OS XZ / 2101 / 2102

Descrição e detalhes:

Thanks to exclusiv internal channels, this rear cover increase engine efficiency by feeding optimaly lateral ports. The fuel mixture is actually less melt by the Camrod movement.

Track consequences:
– About + 20 % Torque.
– About + 30 s Refuel.
– Faster idle stage return.