XRAY T4 Tunable Shock Pistons 1.2mm Four-Hole - Arrowmax AM-T4-308037A2  [AM-T4-308037A2]

1.2mm Four-Hole Pistons for Touring Dampers

Arrowmax AM-T4-308037A2 pistons are compact, maintainable items intended for shock tuning on XRAY T4 and similar 1/10 touring car platforms. The kit contains four composite pistons, each featuring a four-hole 1.2mm pattern to alter oil flow and damping behaviour in standard touring dampers.

Presented as an aftermarket replacement or tuning choice when XRAY T4 compatibility is listed, the composite material aims to offer a balance of durability and low mass. Because both hole diameter and count control oil passage, the 1.2mm four-hole configuration gives a medium-to-high flow restriction compared with fewer or smaller holes.

Installation follows normal touring shock practice: split the damper, remove the old piston, fit the Arrowmax piston to the shaft, and reassemble using existing seals and spacers. Always check piston orientation and free travel, and clean components to prevent seal damage from contaminants.

Tuning notes and checks

• Fit these pistons to refine mid-range damping; the 1.2mm four-hole layout increases resistance versus larger-hole designs.
• Adjust piston choice alongside oil viscosity and spring selection to achieve the desired handling characteristics.
• Inspect shaft straightness and endplay after fitting to avoid binding that can be mistaken for damping faults.