Kyosho IF347-126B Shock Piston Set — 2pcs for Large Shock Bodies  [KY-IF347-126B]

Technical overview of shock pistons

This Kyosho IF347-126B set comprises two RC shock pistons sold as a pair, aimed at larger shock bodies where multi-hole pistons are required to moderate oil flow. They are suitable as replacement parts or as tuning options to refine damping in model car suspensions.

The pair features pistons configured with multiple holes that change the rate and consistency of oil flow, which alters damping response and the feel through the suspension travel. Swapping piston variants or hole counts is a direct method to influence bump and rebound performance.

Standard installation applies: strip the shock, remove the spring and shaft assembly, fit the piston on the shaft in the correct orientation, then reseal and refill with the recommended oil. Always check piston clearance and shaft alignment inside your shock body to prevent binding or seal damage.

For tuning, consider piston type alongside oil viscosity and spring selection: smaller holes or heavier oils produce slower damping, while larger holes or lighter oils increase responsiveness. Adjust incrementally and evaluate on a consistent surface to judge effects.