Trade WB air filter for K&N or Stock

[steveatv3]

I have a WB filter for a Z,KFX, or DVX and i tried to fit it on my 400ex so i am looking for somone willing to give me a stock 400ex filter of K&N that is in really good condition, like my WB only ran about 1hr

[steveatv3]

This is a great deal.....Trading an almost new Performance filter for a ****ty stock one!

I think this will work better on a 300ex because the filter is a little smaller than a 400's