Exhaust I.D.

4 replies to this topic
  • revyrider

Posted April 19, 2013 - 05:36 AM


PO put yz exhaust on my '07 wr450 and its way too loud. Want to replace with a slip on, but I'm not sure if the header is stock or also from a yz.
Is there some way to identify one from the other?

  • DeepPurplishBlue

Posted April 19, 2013 - 08:03 AM


It is almost certainly the YZ header pipe because the stock 2007 WR header is a smaller diameter and the YZ muffler will not fit

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  • MaxPower

Posted April 19, 2013 - 08:47 AM


I believe the outside dia of a YZ headpipe is 1 5/8

  • Krannie McKranface

Posted April 19, 2013 - 01:30 PM


Yz muffler needs a yz header.

  • revyrider

Posted April 20, 2013 - 07:16 AM


Thanks for the replies, will order for a yz. Would the yz header be for the same model year ('07)? It bolts up to my wr with no obvious mods.

Edited by revyrider, April 20, 2013 - 07:19 AM.


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