run longtubes and get a catted midpipe. As far as noise, put some silencers in your exhaust or stick steel wool in there. They only do an idle test and the HC's are the only issue, along with noise you'd have to worry about. If your car is modded take out the diverter valves for the smog pump and hook it straight to the exhaust....
If that still doesnt work then loosen up your tailpipes so it leaks out over the axle tubes. It will be loud and they will do a db test but they can only check at the tips of the tailpipes...
True story: I did everything above on my 2.3 car before I yanked the engine and i have a slip showing zero emissions....hahahhaha they had to pass me.
no prob...
Drew