Yokomo S4-S182-25 13mm Shock Piston 1.8 x 2 Holes 2.5mm 2pcs for SO2.0 and MO2.0

These two 13mm shock pistons use two 1.8mm oil passages and a 2.5mm thickness for SO2.0 and MO2.0 dampers. Piston-hole size directly affects oil flow, allowing this specification to create the intended damping response. Use matching pistons on a shock pair and tune oil and spring selection around the chosen piston setting.