An emissions test maybe but this doesn't test specifically the CAT, just the overall emissions from the entire engine and exhaust so if something that looks like a cat is visable and emissions are ok it doesnt matter if the CAT is present or not
An emissions test maybe but this doesn't test specifically the CAT, just the overall emissions from the entire engine and exhaust so if something that looks like a cat is visable and emissions are ok it doesnt matter if the CAT is present or not