The 14.07 Inch Cummins ISC And ISL Diesel Oxidation Catalysts with an 11.74 Inch Diameter are designed for high durability and effectiveness. Constructed with stainless steel, these catalysts reduce backpressure and fuel consumption, while also meeting EPA07 exhaust emission norms. Each unit comes with clamps and gaskets included, and is manufactured according to OE technology for a perfect match to OE performance. These catalysts are a direct replacement for most Cummins ISC and ISL models, with OE replacement numbers including 26326120259, 281923, 2871923NX, A029B190, 2871923, 2871923RX, and OTR0152011.