FMF Factory 4 pipe?

Have any of you used or know a friend who uses the New factory 4 from FMF. The anodized pipe looks sweet, but wow what a price tag. It does come with header and jet kit, but it's still expensive.

What insert are you guys using for the stock pipe to lessen the noise after the stock insert has been removed? Thanks from a new member..

My bike was never too loud w/o the muffler insert, what WR4XX are you talking about? I have a WR400.

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