I have two used Flowmaster mufflers. I got them from a friend off his 99 Mustang GT. The front flanges are still connected. I do not know what series they are. There is rust on them. I dont need them and just want to get rid of the extra weight. I am asking $40 for both. They will fit all other kinds of cars, but welding is required either way (mustang or other). Will sell seperately for $25 a piece. I want to sell them together.