FMF Powerbomb Header/ Stock Muffler???

yz007f

Member
Jul 3, 2002
21
0
Hi there, I have a 99 Yz400 with a few mods done to it but nothing big. No compression changes etc. For right now I ordered a s/s SX Powerbomb Header and I'm going to try running it with the stock muffler.

I couldn't see myself comming down and spending the money for a muffler. If really your just going to get the noise (95db). I bet I am wrong about that... But I'm looking just for a little gain in the low mid revs. That's why I went for the supercross style header pipe.

My question is, has any just put this Powerbomb header pipe on with the stock muffler?? And if so what are the gains?

Thanks for your time,
yz007f
 
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