WR450 head compatible with yz450 engine?

Will a 2006-2008 WR450 head work on a 2006-2008 YZ450?

Any help is much appreciated.

Thanks!

Yes and no. The '06 WR is a Gen1 engine like the '03-'05 YZ450, and won't fit. The '07-'11 head works, but you will need to plug the holes for the air injection system on the WR head.

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