The 11.43 Inch Cummins ISX Diesel Oxidation Catalysts with an 11.74 Inch Diameter are a high-quality product designed to reduce exhaust emissions and improve fuel efficiency. Made with stainless steel construction, these catalysts are durable and effective, providing a direct OE replacement for most Cummins ISX models. With a reduced backpressure and included clamps and gaskets, installation is easy and hassle-free. Manufactured according to OE technology, these catalysts are designed to match OE performance and meet EPA07 exhaust emission norms. With a range of compatible OE replacement numbers, these catalysts are a practical and reliable choice for diesel engines.