This standard grade replacement diesel oxidation catalyst is designed to match the fit and function of the original catalyst on specified vehicles. It includes 1 diesel oxidation filter and 2 gaskets, making it a convenient and practical choice. Made from quality materials, this catalyst ensures reliable performance and a long service life. It is not for sale in California and is not CARB compliant. This product fits most Blue Bird, Freightliner, International, Kenworth, Mack, Peterbilt, Roadmaster Rail, Spartan Motors, Volvo, and Western Star 2007-2009 models with ISX 15.0 Cummins Engine. Direct OE replacement numbers include Cummins: 2888247NX, 4965304NX, and A035W856.