FMF factory 4.1

I am looking for a slip on for the 08 yz450f. I need a spark arrestor so ill get a less restrictive pipe and a spark arrestor all in one.

its come down to

white brothers E2

FMF Factory 4.1

i just want to know if people like the FMF, I already love the white brothers, but the look of the fmf is nice, anyone have any videos with it on your bike?

Thanks, Dave

I love the factory 4.1 silencer. The only problem is that you have to buy the spark arrester separately. On the 08, really any silencer is better than the stock one.

My friend got the fmf for his wr250 and it really made a nice low mid gain.

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