Cummins Emission Solutions has introduced the EcoFit Single Module, an ultra-high efficiency aftertreatment system. The EcoFit Single Module is designed to be up to 60% smaller and 40% lighter compared to the U.S. EPA 2013 solution it supersedes, while improving emissions reduction performance. The smaller size enables better heat management and retention for improved fuel economy capability, and the simple single-pass exhaust flow design delivers low back pressure. The simpler, innovative packaging allows for fewer variations, offering OEM customers system integration benefits, while providing end-user customers with a more robust and reliable aftertreatment system. This new solution, which will meet GHG and fuel efficiency standards for EPA 2017, specifically addresses the needs of medium- and heavy-duty engine customers in low emissions markets. Advancements in catalyst technologies have allowed the diesel particulate filter to have a bigger ash capacity, allowing for increased time between maintenance events and minimal operator intervention. Improvements in NOx reduction capabilities in the selective catalytic reduction system have been enabled by the use of the EcoFit UL2 Liquid-Only Urea Dosing System. OEM customers will benefit from simpler chassis integration, as the UL2 system does not require engine coolant lines to and from the DEF injector. Operators will see more efficient atomization of urea and minimized urea deposits, thus requiring fewer regeneration events while experiencing the optimal use of DEF throughout the system.