I have a 2 1/2" system that came with the car and a small paper that says ... "1984-1987 T-Type & Grand National Dual Exhaust System...
"Kit contains: 2 front pipes, 2 tail pipes with tapered end, 2 muffler hangers with 2 1/2" clamp attached, 2 2 1/2" clamps, 2 2 1/4", and 2 small "L"...