exhaust header

1 reply to this topic
  • McD23

Posted August 23, 2009 - 01:03 AM


Hi all
I have a 08 wr450 with fmf powercore4 slip-on currently.
Can get a yz header, will this fit this set up, and will it make any gains over stock wr header?

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  • klossWR450

Posted August 23, 2009 - 01:39 AM


I have FMF powercore 4 with YZ powerbomb header on my '07 WR, fits perfect, no mods required, FMF came with two header rings to fit WR or YZ, as to the gains I haven't got any numbers but larger header should increase top end power


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