A Bosal Catalytic Converter can be used on Buick Centurys from the years 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004 and 2005. Effectively functioning Catalytic Converters are critical to fulfill EPA rules for car running. Catalytic Converters cut emissions by oxidizing exhaust gas contaminants into water and carbon dioxide, via a metal catalyst, usually platinum, and venting the cleaned gas through the exhaust valve. Your Catalytic Converter is a device that cuts down on the quantity of nitrogen oxide gaseous emissions from your car, allowing your car to achieve a passing score on your local emissions test. While not easily broken, the converter sometimes breaks or fails, often if it is hit from underneath the car. Situated within the exhaust system of the car or truck, the Catalytic Converter acts to decrease the overall harmful pollutants of a car or truck's by stimulating a chemical process in your vehicle's emissions. Buick Centurys from model years 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004 and 2005 can use this Catalytic Converter. Different cars and trucks may not be compatible, and this Catalytic Converter should not be installed on those models.