exhaust for stock 400ex

[live2ride]

what would the best buy for a stock 400 after market exhaust be slip-on? full system ? which pipe ? don't want to lose power through the wrong pipe . would a full system be a waste ?

thanks a lot good buddy

[flaneledholes]

A header is not really neccesary for the money and all you get is like +1/2 of a horse power for $250... A slip-on is your best bet and to say the least, do a search...