I have a used set of Lentz connecting rods for sale. notes from the original owner state they have 648 miles on them. Not sure exactly what type of miles though. it also states they are 6.250 and the word "charlotte" was also on the attached tag. on the side of the rod itself it reads: "4340 Lentz 7S". I have all 8 and want to sell the entire set. looking for legit offers I know they are worth something. my buddy raced professionally. contact me for any questions, I don't have all the answers, but I can relay some info. thanks.