The 1969 Chevelle had three different dual exhaust system when GM outfitted these muscle cars. The small block dual exhaust cars received 2 1/2″ head pipes and 2″ tail pipes GM accomplished this by swaging down the head pipes to 2″ The 1969 SS with the big 396 saw 2 different and possibly 3 different systems for the 1969 model year. The 396 325 horsepower cars came standard with 2 1/2″ head pipes and 2 1/4″ tail pipes. Our reproduction exhaust system kit comes with correct head pipes with all correct flats and wrinkles, correct flanges, correct size mufflers logo deleted, muffler hangers, screws, correct tail pipes with sized end to accept chrome extensions, all correct GM clamps, correct extensions and donuts for head pipes, installation instructions and diagrams. Tail pipe hangers are available and unless you are lucky enough to have originals or NOS you will not have them as Gardner is the only company that makes them. These hangers accomplished two things they hung the system and clamped down on the extensions at the same time. Ask about are concourse show package. for those of us who have to have it a little bit better than factory correct.