Authority given by the original manufacturer to produce these in demand era accessories. These cast iron Black headers are exact in every detail, including Fenton lettering. The resulting dual pipes on your early pickup will cause that special six cylinder purr, so often heard in past years. Nothing sounds like Fenton duals on Chevrolet six cylinder engines. Lower exhaust back pressure gives better performance! Sold in a set. JIM CARTER TRIVIA: The rear header was designed by Mr. Fenton in the 1950's to perfectly line up with the 1950-62 216, 235 and 261 original rear single exhaust pipe. In this way half of the GM factory exhaust system could still be used. This was a good selling point in the 1950's when money was tight among the younger drivers on a budget. BIG ANNOUNCEMENT: In addition to our most popular color, we can also provide other colors. Allow 10 to 14 days to deliver on colors.