What yr YZ muffler and header fit the 11?

Anyone know what year(s) YZ header and muffler fit the 11 WR 450??

Anything else to have to be done to fit it or does it bolt right on??

Thanks in advance..

I'm quite sure 2007 through 2011 YZF exhaust will fit with no mods with the exception of a possible rejet. I have an 08' stock YZF complete exhaust on my 07' aluminum framed WR450F.

Edited by mikewrf18

06 to 09 should fit straight on

2010 yzf onwards had reverse clylinder so wont fit

06 to 09 should fit straight on

2010 yzf onwards had reverse clylinder so wont fit

Thanks for correcting me on that. I did not know that.

will the 06 -09 yz slip ons fit the 2011 WR 450 without replacing the Wr stock header? is this good for a decent power gain or just minimal and how is the sound?

06 has most power but 100+DB loud

07 is quietest and 2nd best power - IMO best one all around

08-09 best for gnarly ST, bit louder than 07 but about same performance when modded

Whatever you get, get the whole system.

;

I run the 08 full system on gnar single track, 07 pipe otherwise. Or sometimes my Leo vince super stealth pipe on my super secret squirrel trails

"Whatever you get, get the whole system."

Does yz head pipe give better performance, or the yz slip on just wont fit with he stock WR head pipe?

both. get the 08-09 yz header, 07 -09 yzf muffler. the stock WR header is too small

can a spark arrestor be added to the 2009 system?

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