It seems a lot of the responses here are self-serving and, that's just fine. In the spirit of KOH though, I am against all these rule suggestions. Isn't the appeal of KOH to see what man has built to conquer impossible terrain? Why all the limitations suggested? I can only imagine how boring the Ultra race would be if limited to stock displacement/aspiration. I for one would not be interested in watching a bunch of partially modified 6 cyl jeep JK's running the hammers. Pro/Sportsman class? Fine. How about one additional class: Open. Then we will have an opportunity to watch power, creativity, ingenuity and craftsmanship challenge nature's best head on. That is what Hammers is about and that is the evolution of our sport. This is one race that you NEVER want to see restrictions. Build to the hilt and put it up against mother nature and your competition.