XRAY T4 Composite Pistons 4 Hole 1.2MM by Arrowmax AM-T4-308037A2  [AM-T4-308037A2]

Composite 4-Hole 1.2mm Shock Pistons

Arrowmax AM-T4-308037A2 pistons are a small, serviceable RC-scale component intended for shock tuning on XRAY T4 and similar 1/10 touring chassis. The pack contains 4 pcs of composite pistons, each drilled with four 1.2mm flow holes to influence oil transfer and damping characteristics inside standard touring car dampers.

These pistons are offered as a direct replacement or tuning option where the XRAY T4 platform is specified. The composite material balances wear resistance and cost while keeping weight low. Because hole diameter and count directly affect oil flow, the 1.2mm four-hole pattern is useful when you need a mid-to-high flow restriction compared with fewer or smaller holes.

Installation is straightforward for anyone familiar with 1/10 touring car shocks: disassemble the shock, remove the old piston, slide the Arrowmax piston onto the shock shaft, and reassemble using the same seals and spacers. Verify piston orientation and travel before final assembly, and always clean parts and check for burrs that can affect seal life.

Practical tuning notes

• Use these pistons to fine-tune mid-speed damping response; they increase resistance compared with larger-hole patterns.
• Combine piston selection with shock oil viscosity and spring rates to reach the target handling balance.
• Check endplay and shaft straightness after installation to avoid binding that can mimic damping symptoms.