[Excaliber]

flyboy, what year is yours? I'm thinking certain year models had to meet ever stricter emission requirements or were specifically for the Calif market. That 'something' may be a one of TWO cats per side. In some cars (Ford, GM, etc.) TWO cats were needed to get the job done. Two per side in an Excals case for a total of four? Whew, that is one mean muffled exhaust system!

Excal had certain 'exemptions' in reference to Federal standards, but not everything was exempt. I think when the time was up on those exemptions they either could not meet the new higher requirements or the cost of certification was prohibitive.