New for the Serpent Cobra S811 buggy are these ‘square’ pistons. Following extensive testing they have concluded that in order to fine tune your S811 buggy to a multitude of racing conditions you should use these new 8 hole pistons to balance compression and rebound dampening. They will help improve your cars handling in conditions where the bumps are above the racing surface. The shock will be quicker to rebound, putting your tires on the ground more often improving lap times. The pistons are CNC machined from delrin, for super smooth and true shape.