straight pipe exahust set up

[NATman]

Me and a freind are trying to find out if it is PA state legal to have a valve activated exaust bipass. we want to put a y pipe on the end of the down pipe and send one end through the normal catalitic and muffeler and the other straight out the side of the car bypassing all of the "street legal" nessesary parts the valve would be switch activated so that you could turn it on and off but we have yet to get a straight answere of weather or not it is street legal or will pass PA inspection