The Stage6 spacer rings are very difficult to get around if you want to get the most out of your engine. The rings are used between the fan wheel and the variator bushing, to achieve the correct distance so that the belt comes as far down as possible. If the belt starts at the very bottom, you are guaranteed something close to the best winding and that the engine is given the opportunity to work as it should. The set contains 32 rings, which range from 0.4-0.6mm. The size of the rings from 14.8 X 20mm.