XRAY T4 1.1mm 4-Hole Composite Shock Pistons by Arrowmax AM-T4-308037A1  [AM-T4-308037A1]

Replacement composite pistons for XRAY T4 shocks

Arrowmax AM-T4-308037A1 composite pistons are sold as a set of four and serve as direct replacement pistons for XRAY T4 shock assemblies. The 4-hole, 1.1mm specification is used to control oil flow and assist in tuning damping on 1/10 scale touring and pan cars.

In practical tunings these pistons help refine mid-to-high speed damping response and provide a more consistent stroke feel by regulating oil bleed during compression and rebound. They suit racers who routinely alter oil viscosity and shock length to tailor handling.

Fitting is standard for T4-compatible shocks: remove the cap and shaft, slide the piston onto the shaft using the correct retaining hardware for your shock design, then refill and bleed the shock to eliminate trapped air. Standard shock tools and a clean workspace are recommended.

The composite material gives a compromise of surface finish and resistance to normal wear; inspect pistons during routine service and replace matched sets to keep symmetric behaviour across all four corners.