Kyosho IF347-126B shock piston for big shock assemblies, 2pcs  [KY-IF347-126B]

Big shock piston overview

This Kyosho IF347-126B item is an RC-scale shock piston sold as a pair, intended for use in larger shock bodies where a multi-hole piston is required to manage oil flow. It is presented as a straightforward replacement part to restore or adjust damping behaviour in model car suspension systems.

Each pack contains two pistons, configured for multi-hole flow characteristics that influence damping response and stroke feel. The component is best treated as a tuning element: changing piston variants or hole counts alters how oil passes through the piston, which in turn affects bump and rebound performance in the suspension.

Installation is standard for shock pistons: disassemble the shock, remove the rod and spring, replace the piston on the shock shaft while keeping orientation consistent, then reassemble with the recommended oil and seals. Verify fit in your shock body and check shaft alignment before final reassembly to avoid binding or seal damage.

For setup and tuning, pair piston selection with oil weight and spring rates: heavier oil or smaller piston holes yield slower damping, lighter oil or larger holes yield faster damping. Make incremental changes and test on the track to achieve the desired handling balance.