Serpent 500902 Two-Port 13mm Shock Piston 1.7mm for RC Dampers  [SER500902]

13mm two-port shock piston for RC dampers

This Serpent 500902 piston fits 13mm bore RC dampers and features two 1.7mm ports to regulate oil flow. As a replacement piston it enables smaller step changes to compression and rebound for more precise setup work.

Installation: the piston installs inside shock shafts and bodies that accept a 13mm piston bore, positioned between the shaft and piston head within the internal flow path. When fitting, ensure the ports are aligned as required and confirm the piston moves freely without lateral contact.

Tuning role: the pair of 1.7mm ports offer increased flow area over many single-port pistons, modifying damping rates on both compression and rebound. Tweak oil viscosity, shim stacks and spring rate together with this piston to achieve the handling characteristics you seek.

Select this piston where moderate flow is desired for smoother mid-speed damping transitions, and verify changes through methodical track testing.