(1) CUSTOMER-COMPLIANT UPGRADEABLE - This engine is capable of operating with a Three-Way Catalyst at this rating. It is the responsibility of the owner/operator to upgrade the engine with an air/fuel ratio controller and a Three-Way Catalyst capable of meeting the SI NSPS regulations. The owner/operator is required to conduct site compliance testing and submit documentation per the EPA SI NSPS requirements.

(2) This engine does not meet the revised EPA SI NSPS requirements for non-emergency engines and is offered only for use outside the U.S.