o/r x with stingers sound like glasspacks. i have stingers with my o/r prochamber and man does it sound MEAN. pretty darn loud to. but i like it loud.
With stingers i dont think anything sounds better than a catted x-pipe...if you want it do be crazy loud o/r x pipe.
I think Magnaflows sound like crap. I would keep the Prochamber and ditch the catback. But thats just my biased opinion. But yes if you have the sensor out you are going to here an exhaust leak which will screw up the sound.
Why doesn't Mac make the Prochamber in stainless steel? :shrug: If they did I would buy one.
Had my prochamber installed last night. I love it. I would not have any other midpipe matched with the magnaflows.