big shiny n1 style fartcan = poop
stock muffler + electronic cutout = good
http://www.store.yahoo.com/phase2mot...excat19ni.html = good
custom 3" piping + magnaflow/dynomax type muffler + black paint = good, like above but way cheaper.
not guaranteeing you'll get away with any of these, there's always a cop who might be able to tell it was modified, so its a risk you choose to take. but with these, ur definately better off looking stock/stealthy.
in fact, i'd say there is a guarantee you'll never be able to get a ticket for the e-cutout. you could drive by a cop with it open (a la open downpipe basically), flip the switch and it'll be closed within 2 seconds or so and he wont hear u hopefully.