I spoke with a shop owner today who told me a story about a Spyder he had worked on recently. The customer brought the car in a poor running condition, running rich and dumping raw fuel. This was apparently caused by previous work done by a non-expert (many problems have started that way). By the time this was put right, the cats were bad. The OEM cats are no longer available, but one of the two continues to show backorder status with no ETA. Customer had to take the car to the California Bureau of Automotive Repair to see what replacement cats they would authorize. The answer was: none, because the OEM cat is still showing as available (although in practice it is not). End result: Maserati ship anchor. The car can neither be repaired nor registered in California.