SHS Cylinder Head, Piston Head & Nozzle Upgrade Set (V2 & V3)

Upgrade kit for V2 and V3 gearboxes. Works great with ZCI cylinders.

Includes:
- Aluminium nozzle with single o-ring (choose your length)
- Aluminium 6 vent piston head with bearing
- Aluminium cylinder head with padded bottom and dual o-rings