What brand head are you using?
Although, as far as I know, it should not matter. If the plugs are backing out, there is a problem somewhere, not the brand of head.
You just need to measure the mouth of the filter and look at K&N's website. You will probably need a collar of some sort because the 2:1 boot is very flexible and the K&N filter will be flexible as well. You need something kinda like the airbox ring many use on 250rs.
K&N universal filters
FOR SALE: IMS 4 gallon fuel tank. Tank has minor scuffs/scratches, but overall in very good condition. Includes IMS fuel cap. Does not include grommets, petcock, or shroud brackets. $80 plus shipping.
hey old roost! I'm betting any of the site sponsors would send out some stock length studs 4 ya,overnight would be a little
more though. Did ya put the ball in before mounting the preassure plate?
I just bought a set of extremes yesterday from rock mountain for 249.00 and they are 21x12x8 10 paddles. What is your price range,might be a few people on the HQ selling something? Jeff