There are no pre-fabed kits for this car available. I made one for mine out of stock replacement parts. I used the pipes from a 79-80 diesel Riv/Toronado as these are 2.5" in diameter compared to the stockers 2.0-2.25". I used one of the better turbo mufflers(Walker Ultra-Flow) and had to cut of the first 20-24" off the front of the pipe and weld a connector fitting the hook it up to the rear of the cat.
Eric Fisher