The 7.95 Inch Cummins ISM Diesel Oxidation Catalysts with a 12.62 Inch Diameter are a high-quality solution for reducing exhaust emissions. Made with stainless steel construction, these catalysts offer durability and effectiveness. With reduced backpressure and fuel consumption, they provide practical benefits for Cummins ISM makes and models. Each catalyst comes with clamps and gaskets included, making installation hassle-free. Manufactured according to OE technology, these catalysts are designed to match OE performance. Direct OE replacement numbers include 4965217NX, 5287520NX, 4965217, 5287520, 4965217RX, 5287520RX, and OTR0152059.