Yokomo BD9 6-hole shock pistons

Yokomo have introduced new 6-hole shock pistons for the BD9 touring car. Using the same hole diameter as the standard 4-hole variants, the 6-hole parts offer improved absorption against fine vibrations while keeping good overall response for enhanced traction. Also the outer diameter is also slightly enlarged for less blow-by during fast compression and thus improved balance in fast corners. To achieve the same mount of damping, upping shock viscosity by 50 to 100cst is advised.

Source: Yokomo [teamyokomo.com]