While none of us will never say never with Chrysler I must admit that I have never owned an original untouched 67 GTS and have only talked with a couple original owners such as Maynard. The 7 67 GTS's that I have owned were beat hard and put away wet and I am sure that the replacement exhaust that was put on the restored cars that I had were what was available when they were restored which were probably made for later 383 Darts. I have no idea if the tip hangers were put on later or not, but I will look at the convertible that was pulled out of a New York junkyard and see what is under it, who knows?