I have the Extreme system on my rig. Been real happy with it since 11-02. The only thing I've changed is the intake, I use the STOCK filter now. I do like K&N, but in the H2s case--you would never know the difference! --plus, its easier to change, there are no warranty issues in wet conditions, and as mentioned, no noticeable change in performance.
If you go with the Extreme intake, you really need TWO FILTERS, you can't just pop the stock filter back in while you process the dirty K&N filter.
