The Upgrade Series cylinder head have been CNC manufactured in machine-aluminium and thereafter anodized with a colour code for easy recognition. The heads have been designed with double rubber seals to minimize loss of compression from the cylinder. The special 'trumpet design' ensures optimal delivery of air to the barrel/BB. Furthermore, the cylinder heads have a powerful built-in rubber band that absorbs the shock from the piston head.
Purple for version 3 gearbox.