What I've read here on the forums is that you put in the JDM FSZE intake cam, and you can use your old stock intake cam as an exhaust cam. You just have to get your stock intake cam "re-pinned" 180 degrees. Supposedly the stock intake and the Mazdaspeed exhaust cam have the same specs, just 180* off. It means your car is going to be down for a while, but I think that's better than spending the extra $$ on an exhaust cam you really don't need.
And YAY for 900 posts!!!!!!!!