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.

Use VHM standard insert:
AE32021-B (YZ250)
AE32021-092 (YZ250X)

• More engine power
• Better heat transference
• More resistance to detonation