The Detroit Diesel DD15 Diesel Oxidation Catalyst is a high-quality product designed to fit most Detroit Diesel DD15 models. Made with a silicon carbide substrate material and a stainless steel canister material, this kit includes one diesel oxidation catalyst, two gaskets, and two clamps sold each. Although not CARB compliant and not for sale in California, this product is an excellent choice for those looking for a reliable and practical solution to their diesel oxidation needs. With OEM and aftermarket numbers such as RA6804901214, A6804901592, D-DDXH-DNT501, DDDXHDNT501, A6804903014, RA6804903014, 6804903014, and EA6804903014, this product is sure to meet your needs.