The 11.02 Inch Cummins ISB And ISC Diesel Oxidation Catalysts With 11.67 Inch Diameter are designed for high durability and effectiveness, reducing backpressure and fuel consumption. Manufactured according to OE technology, these catalysts are made to match OE performance and fit most Cummins ISB and ISC makes and models. With a stainless steel construction, they come with clamps and gaskets included and are a direct OE replacement for numbers 2885940NX, A030D523, 2885940, OTR0152055, and 4965215. These catalysts meet EPA07 exhaust emission norms and offer practical, reliable solutions for diesel emission control.