Where can I get good Catalytic Converters ? 1.4SE BBY Petrol passed MOT Test last week. Emissions were problematic again, as they are every year. MOT Tester says they should not be allowed to sell those aftermarket Catalytic Converters. Recommends changing back to good used Genuine Audi parts. WOM Automotive agree I should do that. Suggested trying A2Steve but he does not have any. How do you know if a used Genuine Cat. is any good until it has been fitted to your A2 anyway ?