XRAY T4 Shock Piston 4-Hole 1.1mm Composite Upgrade - Arrowmax AM-T4-308037A1  [AM-T4-308037A1]

Precision composite pistons for XRAY T4 tuning

Arrowmax AM-T4-308037A1 composite pistons are supplied as a pack of four and fit XRAY T4 shock assemblies as a direct replacement. The 4-hole, 1.1mm layout controls oil passage through the piston to help fine-tune damping on 1/10 scale touring and pan cars.

In setup work these composite pistons help refine mid-to-high speed damping and stabilise stroke feel by regulating oil flow during compression and rebound. They suit drivers who experiment with oil viscosities and shock lengths, delivering repeatable flow compared with worn or inconsistent stock pistons.

Installation is straightforward for T4-compatible shocks: remove the shock cap and shaft, fit the replacement piston onto the shaft with the correct retaining hardware for your shock, then refill and bleed the unit to purge air. No specialist tools are required beyond standard shock maintenance gear and a clean bench to avoid contamination.

The composite material balances surface finish and abrasion resistance for usual race and practice conditions; check pistons for wear during routine shock servicing and replace in matched sets to keep balance across all four corners.