This cab-mounted shutdown control module is built for Mack E6 and Navistar Universal applications. It works by tracking key engine parameters and triggering an engine shutdown when a critical fault like low oil pressure or overheating is detected. It is sold individually, one per package.Interchanges:Mack 25077195Mack 2MR261P2Navistar 534184C91FeaturesShutdown control module for cab and chassis systemsFits all Mack E6 applicationsFits all Navistar Universal applicationsSold pack of 1 eachTech SpecsSell Pack: 1 EachAdditional InformationFits All Mack E6 and All Navistar Universal applications.