All mufflers will be attached to a 2 and 1/2" pipe. Following a 2 and 1/2" outlet with exhust tips. No CATS, NO Y-PIPE, NO X-PIPE, TRUE DUAL PIPES.

I had true duals with cats and I thought the Flowaster 40s sounded great!

I've got Flowmaster 40's on my Dakota and oh man they sound awsome.  I'm not sure if I'd like them one my Pace Car though, they are a bit loud cilrah38720.7351736111

Louis,
I would seriously consider a chambered exhaust system.  It  eliminates the conventional bulky mufflers that normally go on our cars. I put the chambered on my 75 and absolutly love them. The sound and performance is outstanding. Do a google search for "chambered exhaust" and you will get plenty of information.
Good luck,
Scott

My build sheet says that my car came with "Off Road" exhaust. At one time I thought it was a chambered type system. I'm finding that to be untrue. Can anyone here tell me exactly the off road option is? It wasn't available when I bought the new exhaust system for the car. If it's simply a different muffler that can be purchased separately, I'd consider changing mine out. 68 did not offer side pipes, I'd like to stay stock appearing.

  I ALSO HAVE THE CHAMBERED SYSTEM FROM MID AMERICA. IT IS LOUD AND DOES SET OFF ALARMS. I WAS IN A LOUDEST EXHAUST CONTEST WITH IT AND IT REGISTERED 119 DB. THE ONLY CAR TO BEAT ME WAS AN UNCORKED 502 AT 124DB.....FORGET TALKING ON A CELL PHONE (WHICH I REALLY DON'T RECOMMEND) AND PUT THAT HUMONGUS SPEAKER IN IT LOUIS IF YOU WANT TO HEAR THE STEREO.  IWILL PROBALY ADD SOME MUFFLERS WHEN I GET TIRED OF IT, BUT IT DOES SOUND PRETTY BAD A$$!!!!!

                                                REID  '72 T-TOP

I had the chambered pipes on my '70 and loved the sound...highly recommend them

I installed a chambered system on my 76 and after I layed a scratch pulling out of the muffler shop, I drove around the rest of the day with perma-grin. I got mine from a place called "sweet thunder"...(their web-site actually has a few sound-bites. They are 2 1/2" and 38" long. The entire system is 2 1/2" pipe attached to Headman ceramics, true duals with no h-pipe. I originally though I would go with an h-pipe because I didn't want it to be too loud but I have been plesantly surprised how happy I am with the deep tone. The directions on these have the flow going against the baffles...the sound is incredible but not too loud. Unfortunately at this time, I am still on jackstand installing my Christmas presents, calipers and u-joints.

Mark