pro circuit header fit wb slip on?

[red400exrider]

I have a white bros. e series slip on silencer on my 400ex and I wanted to know if the pro circuit header fit on my slip on, I was allso looking at the fmf powerbomb header, which I allready know fits but I heard that they are known to crack. Allso if you know any other headers that will fit my bike I would like to know

[cals400ex]

the procircuit one will fit. according to procircuit they design their headpipes to fit slip on silencers. however, you may need the exhaust gasket between the header/silencer in order for it to to not leak exhuast.

[hondarider2006]

FMF Powerbomb will fit also;)

[wildchild2]

I to am looking for a header. What kind of gains and how much money? Stock 400 ex 2003 wb e series

[cals400ex]

Originally posted by wildchild2
I to am looking for a header. What kind of gains and how much money? Stock 400 ex 2003 wb e series

the gains will be minimal. if you found a used powerbong or procircuit header for cheap, i would probably go for it. just remember the WB headpipes won't fit on their slip ons.