The 13.15 Inch Cummins ISX Diesel Oxidation Catalysts with a 13.17 Inch Diameter are designed to provide high durability and effectiveness. With reduced backpressure and fuel consumption, these catalysts offer improved performance and efficiency. Manufactured according to OE technology, they are made to match OE performance and fit most Cummins ISX models. Each catalyst includes clamps and gaskets for easy installation. Constructed with stainless steel, these catalysts ensure long-lasting durability. They meet the EPA07 exhaust emission norm and are direct OE replacements for various part numbers. Overall, these catalysts offer practicality and reliability for optimal engine performance.