An Emissions Upgrade Group is one of the solutions offered by Empire Emissions Solutions to reduce emissions from the existing, or in-use, population of Cat® machine engines. These groups include an upgraded turbocharger, fuel pump/governor, nozzles, cylinder packs and installation parts.

3306 & 3406 engines can emit lower emissions levels when specific emissions upgrade group components are installed by a Cat Dealer. Equipped with all the emissions upgrade parts, the emissions upgrade groups are released as paper kits (special instructions must be followed). The engine, marked with an emissions label, will be equipped with an indicator in the field that it achieves lower emissions levels. The engine will receive a new arrangement number and information label and get the same proven components used in later model engines.