The 6.94 Inch Cummins ISM Diesel Oxidation Catalysts with a 13.17 Inch Diameter are designed to provide high durability and effectiveness in reducing exhaust emissions. Made with stainless steel construction, these catalysts offer reduced backpressure and fuel consumption. Each catalyst comes with clamps and gaskets included, making installation hassle-free. Manufactured according to OE technology, they are made to match OE performance. With a direct OE replacement number, these catalysts fit most Cummins ISM makes and models. Improve your vehicle's emissions and performance with these reliable and practical catalysts.