This engine insulator set, sold as a pack of two, fits Mack Universal and Mack E6 applications. It mounts between the engine and frame, cushioning vibration and shock while helping support engine weight and limit noise transfer into the cab.Interchanges:Mack 20QL37P4Mack 25001554FMT-4649This unit is sold in packs of 2.FeaturesPack of 2 engine insulatorsFits Mack Universal and Mack E6 applicationsCab/body category componentTech SpecsSell pack: 2 piecesAdditional InformationFitment: All Mack Universal, All Mack E6.Used in this Mack modelBell Housing Components