XRAY T4 Performance Composite Pistons 1.3mm 4-Hole - Arrowmax AM-T4-308037A3  [AM-T4-308037A3]

T4 shock pistons by Arrowmax

The Arrowmax AM-T4-308037A3 package supplies four composite pistons for XRAY T4 shock assemblies. These pistons use a 4-hole pattern with a 1.3mm bore, providing a match to common piston geometries for tuning with different shock oils and bodies.

Fitting to standard T4 shocks involves removing the shock shaft assembly, changing the piston to the Arrowmax composite unit, and reassembling the shock with the correct oil volume and seal condition. Always verify piston travel and endplay during assembly to avoid internal binding.

By changing internal flow characteristics, the 4-hole 1.3mm pistons give a balanced mid-range damping profile that improves bump absorption while maintaining controlled rebound. Progress with small oil viscosity changes and spring swaps to achieve the desired chassis response on race day.