The exhaust the car came with when I bought (2 wks. Ago) the car was prochamber (cats) w/pair of pypes m-80 I had never heard of them prior to this car.
I had magnapacks (these were the original direct flow muffler, before Borla Stinger/ATAK FYI) with a P/C on my 98. While it was the BEST sounding exhaust I have ever heard (I had a guy follow me over 5 miles to ask me the setup) it was so stinking loud I said I would never do it again. I would at least consider a catted X if you do magnapacks. It will be ridiculously loud.
EDIT: just saw your other thread. If you are not looking to terrorize the neighborhood or set off car alarms, magnapacks with a P/C is not for you. This is the exact deliverable from the setup, terror via NASCAR like exhaust.