450 head ?

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.

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

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

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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