04WR450F exhaust question

6 replies to this topic
  • briter

Posted May 02, 2006 - 02:49 PM


Does anyone know (or have you tried to fit) the "aftermarket" GYT-R Header Pipe into the stock 04WR450F muffler. I have destroyed my header pipe biffing on rocks and must replace it. The price for the GYT-R header is actually cheaper than the stock pipe and I would like to use it for better price and more power. Unfortunately no one can tell me if it will fit my stock muffler. I believe the Yamaha website quotes it as having a large diameter stainless pipe for better flow, power, etc.

Question 2: Are there any other aftermarket header pipes for the 450 that would fit into my stock muffler? For example would a FMF , White Bros or Yoshi header fit into this muffler? :crazy:

  • jerryls

Posted May 02, 2006 - 10:00 PM


I bought the GYTR stainless header for my '04. It fit perfectly. Much more rock friendly than titanium.


  • Matty05

Posted May 02, 2006 - 10:05 PM


The FMF powerbomb headers will fit your stock muffler.
The GYTR headers will fit as well. You can also get high flow Procircuit headers to fit as well!

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  • briter

Posted May 03, 2006 - 05:56 AM


I believe that I'll go with the GYT-R header. Thanks Brian

  • bg10459

Posted May 03, 2006 - 07:33 AM


Look for a YFZ header on ebay. It's stainless instead of Ti like the ones off YZF's and WR's. I got mine for $15 shipped to my door. :crazy:

  • Bat-450

Posted May 04, 2006 - 03:50 PM


Hey Matty05,

are you sure that the fmf powerbomb header will fit the stock muffler ? Because I called and asked fmf and they said that it would not be compatible. I've wanted to try it, and if I did, would I feel a difference ?

Thanx in advance !

  • AUS_WR450

Posted May 05, 2006 - 06:56 PM


I have got an FMF SX powerbomb header of my 04 WR450f and it fits fine with the stock muffler. I think that they are over-rated as I haven't noticed any appreciable power anywhere in the rev range, plus FMF make claims that it will lower the sound output level slightly. Once again, I can't notice any different. :crazy: I would go the GTYR header.


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