Mike, Where does the link go? My computer cancelled it. I have original 66 and 67 Commando Y pipes, NOS mufflers and a resonator. I know what they are. I also know the straight thru was changed to a real muffler in 66? I have that one also. I believe the 67 muffler was part of the intermediate pipe. Accurate made the exhaust on my 66 Barracuda but they made me a straight thru front muffler. It is not the same as Original but it works. Thanks