The 39.57 Inch International And Navistar MaxxForce Diesel Oxidation Catalysts are designed with a 4-inch diameter for optimal performance. With a length of 39.57 inches, width of 9.3 inches, and height of 16.19 inches, these catalysts are made to fit most International and Navistar MaxxForce models. Manufactured according to OE technology, they are a direct OE replacement for numbers 2594140C91, 5011118R91, OTR0152031, and 5011118R91. Made from stainless steel, these catalysts are built to last. Each catalyst comes with clamps and gaskets included, ensuring a hassle-free installation. With an exhaust emission norm of EPA07, these catalysts are a practical and reliable choice.