I am looking at upgrading my air filter to either the K&N 3909 or the Ness Big Sucker. I like the looks of the bare filter on the side, so I dont want to cover it up with the stock air filter cover. I have seen quite a few filter covers that would work with the Big Sucker filter, but I cant find any oval covers that would go with the K&N oval filter in the 3909 kit. Can anyone point me in a direction as to where I could find replacement covers that would work with the oval K&N filter without covering it up?

 

Clenaghen
I'm almost certain their are no oval covers that would leave the filter exposed. As for both of the air filters you've mentioned. I actually tried both of them when my bike was on the dyno and the Big Sucker out performs the RK-3909. Check out my signature pic. Many around here are using this set-up with the
Big Sucker or the Screaming Eagle.

 

Here is the cover I use.



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