To provide an apparatus for feeding secondary air to exhaust gas in an engine. The apparatus includes a cylinder head having an exhaust port for discharging exhaust gas from a combustion chamber and a secondary air feed passage for feeding secondary air to exhaust gas flowing through the exhaust port....http://www.google.es/patents/US6311483?utm_source=gb-gplus-sharePatente US6311483 - Apparatus for feeding secondary air to exhaust gas in engine
Apparatus for feeding secondary air to exhaust gas in engine
