Kooks Headers Question

[Greekws6]

My girlfriend recently purchased me Kooks longtubes for Christmas (amazing i know). She got the 6500 RHS 1-3/4" x 3". I was wondering if the fact that they have airfittings only play a part in emmissions? Will the EGR system have to be modified in order to run these headers, and will my check engine light illuminate due to the egr? I figure if i have 02 sensors on them (or simulators) the SES wont pop up, and i know that in MD all we do is plug in the OBDII for emmisions so no codes=pass.

Also...i have a slp loudmouth rear section, so another question i raise is cat or catless??? What y-pipe do you guys recommend?

Thanks for the help
Gus 02 WS6

[Greekws6]

i mean air pump not egr