I had one set of fenderwell headers I moved to several 64-65 Barracudas back in the day, and they were 1 5/8 tubes. They were either Hedman or Cyclones, but I can't remember which? Last time I saw em was when I sold a rough old 65 Barracuda that I stuffed a 340/727 into. It smoked like a tar kiln, but ran like a bat outta hell! The main thing I remember about those headers was, you had to cut the brace between the front frame rail and the rocker panel to make room for the collector. Good riddance to those lousy things! LOL :realcrazy: