The 13.2 Inch Cummins ISX Diesel Oxidation Catalysts are designed with a 13.27 inch diameter, making them a reliable and efficient solution for reducing exhaust emissions. With a stainless steel construction and manufactured according to OE technology, these catalysts are made to match OE performance. They are sold individually and come with clamps and gaskets included for easy installation. These catalysts fit most Cummins ISX models and are direct OE replacements, with part numbers 5295365 and OTR58218. With their practicality and adherence to EPA07 exhaust emission norms, these catalysts are a beneficial choice for diesel engines.