The Dayco 89498™ Gold Label® Heavy Duty Automatic Belt Tensioner keeps you Ready for the Road Ahead™ being meticulously engineered to the most stringent design specifications. This belt tensioner features a high-strength cast aluminum body designed to keep contamination out and resist cracking, fatigue, and deformation. In addition, the advanced material used reduces weight when compared to regular belt tensioners, while providing added strength and durability. The Dayco heavy duty belt tensioner boasts several patented components which are engineered to handle the higher torque and power pulses exerted by modern diesel engines. FleetPride is your First Click in Heavy Duty®.