H.D Automatic Belt Tensioner

Features Maintains constant tension on serpentine belt drives. Eliminates belt noise and reduces slippage. Flat spring design for less operating range variations in tension. Prevents premature accessory bearing failure due to high belt tension, when a new belt is installed, and poor accessory performance caused by low tension after the belt begins to stretch. Heavy duty cast aluminum arm offers extra durability and less distortion. Lubricated nylon pivot tube bushing and spring bushing for quieter performance. Ptfe strip wound within the spring for abrasion resistance. Coated flat spring to ensure high resistance to rust. Zinc-coated mounting bolt that resists rust. Specifications Type: Automatic. Direction: Counter Clock Wise. Belt Type: Serpentine.