if you run a champ you don't want a M rated. the big difference between an m and sa are two things . First sa have a nomex liner m have a nylon, the second is m are not tested for several impacts to a roll bar like an sa is. bottom line get a 2005-2010 sa and you can wear it for anything. I have a new 05 med g-force I'd sell cheap if you are interested. never used it just tried it on