The 1986 – 1987 Buick Grand National Exhaust System is a bit out of the ordinary for the vintage muscle car exhaust experts. The fact is that this system had to be done simply because we believe it to be the last of the Muscle Cars and a cool one at that. Our system has been reproduced from our original and comes complete back from the catalytic converter. The system comes as a kit with the correct 2 1/4″ y – pipe with wrinkles and correct flange welded on, correct 2 1/4″ over axle pipes with wrinkles, correct muffler with “Factory Checked” stenciled on, correct 2 1/4″ painted tail pipes with correct double angle cut, correct guillotine style clamps, installation instructions diagrams and sealant.