early model '03-'05 yz 450 exhaust on a '06

just wondering if the '03-'05 yz 450 exhaust systems oem or aftermarket are going to be different than the '06-'07. im looking at a aftermarket exhaust and just wondering if the earlier models would fit or with the frame redesign if you can only run ones for the new frame any input is greatly appreciated thanks.

They will not cross fit. Because of changes to the cylinder slope angle and the layout of the frame, the two bikes are too different.

thanks i just wanted to make sure.

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