Instructions were on the back of an advertisement for Gibson. It did not explain where to mount the c clamps in relation to the joints. It described clamps by letters, but no letters were present, only numbers. I broke one c clamp over tightening because it wouldn't squeeze the pipe where I had the clamp. Really good fit and finish though. Great sound at start up and accelerating.
Flowmaster 50 Series Delta Flow Muffler
this is my second one of these. great build quality, can get a little drony if installed with no resonator on a 3.00" or larger pipe. and the stainless 409 version comes coated in something - not sure if ceramic paint or just high temp paint, but it looks MUCH better polished. great quality.