ok.. for now all i got is a flowmaster 80 series muffler on stock piping. its fine for now, it sonds good, but when i upgrade my exhaust probably next season, i wana go all out. headers, highflow cat, and 3" catback. one of the obsticals i have run into is catbacks for 85' are crappier than 86' and up. im thinking i will get SLP headers a Catco high flow and a flowmaster 3" american thunder. what are the stock specs on the 85 cat? could i get a 3" in 3" out one to work? what size diameter is the SLP Y pipe that comes w/ the headers? i will probably get eh 1 3/4 ones because of the inevitable 355 swap.