The 13.58 Inch Cummins ISB Diesel Oxidation Catalysts with a 10.61 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 ISB makes and models. Each catalyst comes with clamps and gaskets included, making installation hassle-free. Manufactured according to OE technology and designed to match OE performance, these catalysts are a direct replacement for OE numbers 5287478 and OTR58200. Improve your vehicle's emissions and performance with these reliable and efficient catalysts.