XRAY T4 3-Hole Composite Pistons 1.1mm Upgrade - Arrowmax AM-T4-308037B1  [AM-T4-308037B1]

Aftermarket composite pistons for T4 shock tuning

The Arrowmax AM-T4-308037B1 piston set provides a simple way to alter damping on XRAY T4 and compatible T-series shock bodies. This four-pack of 3-hole 1.1mm composite pistons is intended to adjust flow characteristics without the need to change oil grades or springs.

Tuning role: these pistons fit standard T4 shock bodies and change the internal flow pattern to influence mid-speed damping behaviour. The 3-hole arrangement raises oil throughput versus fewer-hole options, delivering a livelier compression and rebound feel for layouts that demand fast mid-stroke performance.

Installation tips: sized for common T4 shafts, the pistons secure with standard retaining pins or small hex retainers depending on your shocks. Clean the piston bores and keep oil consistent when testing piston swaps so you can isolate changes from piston geometry. Inspect parts for any machining marks and verify free piston movement before final fitment.