All new Capacity model yard trucks meet US federal emissions standards for heavy-duty engines. These standards are set by the EPA and California standards by the ARB.
In 2008, the EPA mandated that all three-quarter-ton and larger trucks to install diesel particulate filters. You will find these filters on Capacity yard trucks starting with 2007-2009 models.
In 2010, the EPA tightened the restrictions on emissions with advanced technology expanding the use of diesel exhaust fluid (DEF) with the use of diesel particular filters (DPF). Combining both components of the exhaust system it is designed to remove diesel particular matter or soot from the exhaust of a diesel engine.