have the 400ex with alot of mods done, using the stock header. will i gain any more power if i put on the after market header. i have the ids-2 super trapp pipe, slip on, on it now, is the super trapp header bigger in diameter than the stock. will it allow it to flow better???
i was told that buying the header was a waste of money, buy the dealers that sold them???????????????????

99 426ex,11:1,web cam,port job,rev box,k/n,
dyno jet kit,6 air box vents,ids-2 super trapp pipe,14 tooth sprocket. = lots of kick *** power

 

well!!!!!!!!