Agreed - ridiculous if they don't.
Reality - they make more money on aftermarket sales of them vs. including them on the sled!
I'm betting it's more of a tooling/labor issue with the dual layer tunnel they have now. Not real fast and easy to put on the assembly line. More likely with a new chassis.
I'm not buying a new cat until they put factory replaceable boards on them.
Do guys trash boards on the regular?