I have not been able to find very much information on No-Toil's extreme condition air filter. I called and spoke with two people at No-Toil and they both said there is no reason to use the extreme condition air filter for casual desert/track riding. They say the extreme condition air filter is for desert racing situations or super silty conditions. I still don't seem to feel confident in buying their standard (Premium Air Filter). I dont want to buy the wrong filter. Both the standard and the Extreme condition filters cost the same. Wouldn't someone just buy the extreme condition air filters for the added security? What are the negatives of using the extreme condition for extra protection? Less air = less power? Are the riding areas like (Hungry Valley, Milestone MX track, Cal City) considered silty or "extreme" conditions? I could consider all of those places dusty - is it enough to be considered "extreme". Does anyone have any experience using these filters?