E63 MBH Headers

If I buy the MBH long tube headers and mid section (which should allow me to bolt up to stock exhaust) do I loose all the Cats? From the pictures I have found it looks like I would be ditching all the emissions unless I purchased the $700 high flow cat option. Just looking to prevent my car from smelling like my harley. I live at 7000ft and so far evey car/motorcycle I have removed a cat from stinks because most cars cant use all the fuel up this high. They dont even sell 93 octane up here lol.








