FMF quiet insert

I have a fmf powercore 4 exhaust on my YZ450 I just bought and the thing is really loud.I saw on FMF site you can buy a quiet insert and I'm wondering how it will affect the power on the bike.

I have a fmf powercore 4 exhaust on my YZ450 I just bought and the thing is really loud.I saw on FMF site you can buy a quiet insert and I'm wondering how it will affect the power on the bike.

Not sure what year your bike is but i have an 03 yz450 with the new ti 4 pipe "same thing I think" and I use the quiet to atempt to pas tech. With the quite insert it blows right around 98db at like 4100 rpm. Also it kills the power big time.

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