This standard grade replacement diesel oxidation catalyst is designed to match the fit and function of the original catalyst on specified vehicles, including American LaFrance, Freightliner, Kenworth, and Peterbilt models with ISM 10.8 Cummins engines. It includes one diesel oxidation filter and two gaskets, and is made from quality materials to ensure reliable performance and long service life. This direct replacement restores functionality and is not for sale in California or CARB compliant. Upgrade your vehicle's performance with this durable and practical replacement catalyst.