3.8LWagon,
I installed the mufflers and the Y pipe section in the rear only. The pipe welded right up to the existing stock 93 ATX exhaust. The loop portion of the stock set-up fits right in with a minimum adjustment of the hanger to the rubber isolator. The mufflers bolted up without a problem but on the passenger side you will need a bracket that is mounted off the rear bumper mount to connect a rubber isolator to hold the passenger side muffler. Make sure that you are happy with the way the mufflers are positioned before you weld the pipe.
Good luck, Mike