For Sale two almost new mufflers off my 78. They have less than 1000 miles on then and I would guess it is closer to 500 miles. I took them off when I installed side pipes. I looked them up and the cost around $180 new, but I'm only asking $100 + shipping, but will look at any offer. I also have the rear Y pipe and hi flow Cat that was install at the same time. All had been welded in and will need a little clean up before installation, due to having to be cut off.
Gary
Gary