I want to put some true dual exhaust with the two mufflers on my 92 3.1 v-6 which used to have a single pipe going into the muffler which then splits into two tailpipes how would i go about getting a exhaust setup for my camaro and if I take off the catylitc converter, is this emissions legal?

Its really not worth the effort. 2 things you may look into.
(1) a 91-92 Z28 had a dual cat setup that went into a single 3 inch pipe and the oly thing needed to make it better was a flowmaster crossflow muffler.
(2) If you read high tech performance you need to look in the back of a issue and there is a company that makes a single 4 inch pipe with a 4 inch flowmaster muffler in the stock location.
Keep in mind that both of these are overkill for a V6 unless you have some sort of forced induction.