almost no muffler shop in CT will do an exhaust without a cat.
they can get nailed hardcore for it. the only way they will do it is if you trailer the car to and from the place.
besides the shop gettein fux0red if you are caught drivin a car without a cat. not only do you get a $5000 fine, they make you go thru inspections after the work is done.
Whatever the case it's not worth the extra 2hp. put it back on so we can all breath a healthier life.
cats are gay, but if u sound that loud u must have a hi flo muffler and/or bigger than stock pipes. having no cat on a stock "soda straw" exhaust system shouldnt make much difference in sound. one of the cop stations in LA county got busted for "modifying" their cats a few years back (they poked them thru with a broomstick). the news said it boosted their power like 15%, but those are police pursuit modified V-8's
i say put back your cat, or at least buy a $120+ hi-flow one (which wil only give you about 1hp, unless you have a high output modified engine).
Don't hollow the stock cat. Your power gains will be insignificant if they exist at all. Most likely you will see a loss in power over stock. If you absolutely have to modify your cat, get a high flo. Even then it is not worth the 1-2 hp you might see.