... , which are suitable for cars in all types and can meet the emission standard Euro2, 3, 4, EPA ... internal combustion engine .3.The cells of honeycomb density can be 100,200,300, 400 or 600 CPSI and ... more. The shape will be round, oval, racetrack or other special . Quantity control systems ... 30-more specification depend on customers' requirement intermediate round motorcyle catalyst