I will check my NOS tail pipes this week. I bought a complete system from you EXCEPT for the tail pipes because I had the NOS pair and they would not fit the mufflers you provided. I recall measuring them then and had to get two reducers to the back of the muffler to the tail pipe. I know 67's are different but these had the factory part number tags on them for 1969. Of course this was 20 years ago and you were not reproducing the tail pipes then if I recall correctly.