This is a set of two 16mm Tapered Shock Pistons with 10 posible Part-Drilled straight holes from Ultimate Racing. These pistons are partially drilled, so each driver can finish making the number of holes they want according to their needs. These pistons are CNC machined to guarantee the concentricity between the piston and the shock bottle while ensuring its consistency between different productions. Thanks to its conical shape, depending on how we mount the piston, taper up or taper down, we can adjust the resistance that the shock absorber opposes to compression or extension. Taper up will facilitate compression and taper down will facilitate extension.