"This document specifies the procedure to be used for a manufacturer to certify the net power and torque rating of a production engine according to SAE J1349 (Rev. 8/04) or the gross engine power of a production engine according to SAE J1995. Manufacturers who advertise their engine power and torque ratings as Certified to SAE J1349 or SAE J1995 shall follow this procedure. Certification of engine power and torque to SAE J1349 or SAE J1995 is voluntary@ however@ this power certification process is mandatory for those advertising power ratings as ""Certified to SAE J1349"". Rationale Power and torque certification provide a means for a manufacturer to assure a customer that the engine they purchase delivers the advertised performance. Purpose of Standard This SAE Standard has been written to provide manufacturers with a method of certifying the power of engines to SAE J1349 or SAE J1995. Field of Application This certification process is applicable to all engines tested under SAE J1349 or SAE J1995."