i have been considering on purchasing a air filter for my 400ex. i have modified my stock exhaust acording to the web site that was posted in the forums and i know want to drill some holes in the air box with vents and install a air filter. my honda dealer has a white brothers filter on the shelf. are these filters very good. i am really concerned more with how good it really filters. I don't like k&N because of bad experience. i was also considering a unifilter but i would have to order it. also if i did this what would be a good main jet to install. i have a 150 in know with the modified exhaust how much higher would i need after the airbox mod and filter. thanks for all help.

 

We modify all our 400EX's with White Brothers parts. Pipes,filters,cams,
and the whole nine yards. They have always done an excellent job.

I know that different elevations will require different jetting, but in the south, we run 155s when using the header, silencer, cam, 440 kit, filter, and hi-rev CDI box.

KNOWSALOT