The world famous golden VHM head with exchangeable combustion chamber is specially developed for optimal power output during the whole race and has an improved water duct. It's manufactured from a high quality alloy and O-rings are used for the sealing. Vent screw (M6x8) and small copper washer (BD36006) are included and mounted on the head.
Use VHM standard insert: AE32257-E (for OEM piston) AE32257-026 (for 12° VHM piston APKT12511673)
Use the insert chart as a general guideline to select the insert depending on the fuel, track and elevation.
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