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

Composite pistons for XRAY T4

Arrowmax AM-T4-308037A1 composite pistons are a direct replacement piston set intended for XRAY T4 shock assemblies, supplied as a pack of 4 pcs. The 4-hole, 1.1mm specification describes the orifice configuration used to control oil flow inside shock bodies, making these pistons a focused option when tuning damping response on 1/10 scale touring and pan cars.

In practical setup work, these composite pistons are used to refine mid-to-high speed damping response and to stabilise stroke feel by regulating how quickly oil passes through the piston during compression and rebound. They are suited to teams and drivers who adjust oil viscosity and shock length as part of their tuning routine, providing repeatable flow characteristics compared with worn or inconsistent stock pistons.

Installation is straightforward for T4-compatible shocks: remove the shock cap and shaft, replace the piston on the shock shaft using the appropriate retaining hardware for your shock design, then refill and bleed the shock to remove air. No special tools are required beyond standard shock maintenance tools and a clean workspace to avoid contaminants in the shock oil.

Material choice (composite) offers a balance between surface finish and abrasion resistance for normal race and practice conditions; inspect pistons for wear as part of routine shock service intervals and replace sets in matched groups to maintain symmetry across all four corners.