... , used for diesel car, past euro 3,4, 5,EPA, CARB. Leading in the field of automobile catalysts, catalytic converters, mufflers ... produce various kinds of automobile catalysts, catalytic converters and mufflers , which are suitable for cars in all types and can meet ... metals such as platinum, palladium and rhodium, which are used for purifying of unburned hydrocarbons (HC) , carbon monoxide (CO) , and ...