I was bored yesterday so after I washed my Crossfire I decided to pull the airbox off and take a look at the condition of the filters. Boy, was I shocked at what I saw. There was all kinds of dirt/sand/leaves/low-flying birds lodged in there! I took my handy-dandy air compressor and blew everything out and re-assembled it. I expect to get at least a 10 HP gain from the increased air flow!

Seriously, if you haven't done it yet, pull your filters and take a look. And remember, if you decide to use compressed air on the filters, blow from the clean side, not the dirty side. You want to force the dirt out of the filter, not lodge it in there further!