... rare earth compound oxide compound coordination function, causes in the exhaust CO,HC, NOX has the oxidation, ... suface of catalytic converter is necessary of life.In order to human envirement,we need it. ... OBD II All product all satisfied EPA emission standard and Euro 2,3,4 .Material: stainless steel ... NOx by up to 98%· Can be provided in a standard or custom configuration · Applied enginers: 376 378 ...