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450 head ?

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hello, i have a 06 crf 450 r and was wondering what other year head will fit and if a 450 x head will work dealer says 04-06. did not ask about the 450 x head just thought of it thanks.

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Minor differences but 02-08 heads all interchange. 07-08 heads use smaller exhaust valves and ports. 06-up have softer intake valve seats.

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what about the cam assembly. are the smaller valves better on performance.

You can use your cam assembly on any 02-08 head. The smaller exhaust valves of the 07-08 head provide more low end and mid range without affecting top end power.

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