What years are interchangeable 06-09 YZ450F, header and silencer? Thanks
The mounting for the full system is the same from 06-09. The header is the same from 03-06. The mount on the midpipe of the silencer changed with the aluminum frame in 06 (but the header stayed the same). Then in 07 the diameter of the pipe at the midpipe jooint changed. If you are changing the whole system, 06-09 will fit fine.
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