The 16.45 Inch International And Navistar MaxxForce 13 Diesel Oxidation Catalysts are designed with a 12.55 inch diameter for optimal performance. These catalysts are made with stainless steel construction and are manufactured according to OE technology, ensuring a perfect fit and matching OE performance. They are sold individually and come with clamps and gaskets included. With a direct OE replacement number, these catalysts are suitable for most International and Navistar MaxxForce 13 models. Meeting EPA07 exhaust emission norms, these catalysts offer practicality and reliability for your diesel engine.