The 12.8 Inch Cummins ISX Diesel Oxidation Catalysts with a 13.14 Inch Diameter are a high-quality product designed to reduce exhaust emissions and improve fuel efficiency. Made with stainless steel construction and manufactured according to OE technology, these catalysts offer high durability and effectiveness. With a reduced backpressure and fuel consumption, they provide practical benefits for Cummins ISX models. Each catalyst comes with clamps and gaskets included, making installation easy. This direct OE replacement product, with OE replacement numbers 4328760NX, 4328760, 4328760RX, and OTR0152057, ensures a perfect match to OE performance.