The 1968 Chevelle had two 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 1968 SS with the big 396 used 2 1/2″ head pipes and 2 1/4″ tail pipes that ended at the back of the car and pointed down and out.. Our exhaust system kits on all applications come with the correct head pipes with wrinkles and flats and correct tail pipes with wrinkles and double angle cut. The kit will also include correct mufflers logo deleted, correct muffler hangers, clamps, screws, installation instructions, diagrams and sealant. tail pipe hangers are available as well as retainers and strap clamps for reproduction authenticity. Ask about our concourse package to bump up to corded rubber zinc plated hangers, ss clamps, ceramic coated flanges, retainers and strap clamps. Or pull out all the stops and have us hand build you button head riveted hangers.