This pipes discussion REALLY gets old.Ignoring the fact that it will make the bike extremely loud (and probably illegal in some states),
wow, is that a yearly inspection?Well, over here in the old world, if you get caught with modified pipes, it invalidates your registration, so you get ticketed for driving an unregistered vehicle (which is considered as a form of tax evasion, so it's not taken lightly).
Since they often setup checkpoints during the summer, if you get caught, the bike gets parked there / impounded until you can pick it up with a trailer. That will already set you back a few hundred euros, plus the cost of having to have the bike inspected again in order to have it re-registered. I took my bike through the inspection yesterday - EUR 62.00 for the German HU (main inspection) and ASU (exhaust/emissions inspection).