2009 yz450f header?

I'm looking to get a new stock header for my 450 and i was wondering if there is any diffrence from the 2007-2008 models?

I'm looking to get a new stock header for my 450 and i was wondering if there is any diffrence from the 2007-2008 models?

 

I'm not 100% on this but I read the 09 had a larger diameter than the 07-08 due to trying to make up for the restrictive stock muffler. If I rember correctly if you have an aftermarket muffler the 07-08 header is more desirable because once you open up the muffler the 09 large diameter header is said to flow to much resulting in a loss of low end.

 

I had a complete FMF ti 4.1 system on my 09 and the FMF header diameter was the same as my buddies 08. Due to a crash I put the stock header from my 09 back on and it is noticeably larger diameter than the FMF header was. That said I felt no power loss but it sure changed something because I had to change my pilot jet to a smaller one upon doing so to get it to run crisp 

According to a website I buy oem parts from the 08 and 09 use the same part number but the 07 uses a different part number for the header pipe.

Are you looking for a header pipe?

'06, '07, and '08-'09 were three different headers.  The outlet diameters are also different; larger on the '08-'09 than on the '06 and '07.

I just wanna know if 07, 08 and 09 headers are interchangeable. I just need a stock header.

I just wanna know if 07, 08 and 09 headers are interchangeable. I just need a stock header.

08 and 09 are interchangeable. 07 is different.

You can PM me if you are interested in buying one from an 09

I just wanna know if 07, 08 and 09 headers are interchangeable. I just need a stock header.

Then you should read what's been posted.  The answer is no. 

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