... converter Quick Detailscordierite substrate, less precious metal coating, used for diesel car, past euro 3,4, 5,EPA, CARB ... professionally produce various kinds of automobile catalysts, catalytic converters and mufflers , which are suitable for cars in all types ... such as platinum, palladium and rhodium, which are used for purifying of unburned hydrocarbons (HC) , carbon monoxide (CO) , and ...