This front engine insulator fits Mack E6 engine applications and is sold as a 2-piece pack containing two identical units for a complete replacement. Mounted between the engine and frame, it absorbs vibration and isolates engine movement to limit noise and stress reaching the chassis.Interchanges:Mack 20QL1171Mack 25162214FMM-4652This unit is sold in packs of 2.FeaturesFront engine insulator for Mack E6 enginesSold as a 2-piece pack, both units includedTech SpecsSell pack: 2 piecesFitment: Mack E6