1991 ZR1 Failed Emissions

[Jason 91]

Happy Thanksgiving everyone!

To my disappointment, my ZR1 failed its emissions test last week. I initially expected that it was the original injectors finally starting to go out and I was ready to replace them. I took the car to a local Corvette shop that has done work for me before and they told me that while the car may also need new injectors, one of the catalytic converters is bad.

I know that the exhaust manifold and catalytic converter are all one piece and no longer available so I’m unsure what to do at this point in time. I’d like to keep the car as close to stock as I can (if I start modifying this car, my discretionary spending won’t be able to keep up with my desires) and I need the car to pass emissions. What are my best options assuming one of the catalytic converters needs to be replaced? If I can find them, can I bolt the 1992 – 1995 exhaust manifold/catalytic converter set up to a 1991?

Here’s some other information that may or may not be of use to you.

49,300 miles on the odometer
No trouble codes
New plugs, wires, PCV valves, coolant and thermostat, fuel filter, Mobil 1 and filter and rear differential fluid
5,280 altitude

Thanks in advance for your help.

Jason