Bill's Pipe

anyone have any experience or info on how these pipes would work on a 2009 YZ450F?

looking to do a little work and freshen up my 09.


Bils Pipes were Big once on 2 strokes but I dont know much about them for the 4 strokes.

Something to thnik about FMF, Pro Circuit parts Pipes so on if you screw one up you can get replacement parts alot easyer than some other brands.

It like having name brand tires on you'r car get a flat or just a bad tire it easy to find replacment tire just about any where but if you have some off brand tire and it go's bad it a lot harder to find anouther.

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