The 17.4 Inch Cummins Diesel Oxidation Catalysts with a 10.63 Inch Diameter are a practical and effective solution for reducing exhaust emissions. Made with high-quality stainless steel construction, these catalysts offer durability and long-lasting performance. With a reduced backpressure and fuel consumption, they not only help the environment but also improve fuel efficiency. Each catalyst comes with clamps and gaskets included, making installation hassle-free. Manufactured according to OE technology, these catalysts are designed to fit most Cummins makes and models. Direct OE replacement numbers include 5287473NX, 5287473RX, 5287473, and OTR58076.