If I'm not mistaken, the Racing Beat portion of the exhaust is only the axel back...is it not? If soo, it would be easy to manufacture an exhaust on a different mazda that would accept this axel back portion. It would be cost effective to use a part that is already in production than it would be to manufacture a new part (which is why we have this dinky-ass FMIC on the MSP).
Either that, or they are producing them for their aftermarket support....just a few thoughts
Anyway, shouldn't this be in the "Mazda Family - All Mazdas" forum....it's more rumors than anything.