Part Description: 1041Lt Air1® Diesel Exhaust Fluid (DEF) Diesel Exhaust Fluid (DEF) is a pure, aqueous solution of urea and water, to be used in new diesel SCR engine technology. AIR1® DEF is API certified to guarantee product quality. Performance Features & Benefits: Meets automotive industry specification defined by ISO 22241 Required in trucks using SCR technology, DEF helps reduce emissions of NOx gases that are produced inside the engine during combustion
