Dayco Automatic Belt Tensioner 89426 Moly MC-4ST 10W-40 is a superior

MC-4ST 10W-40 is a superior performance premium engine oil with 100% PAO & Ester

Type: 6PK Flat Polymer with Fixed Bolt

Its fast acting formulation effectively seals radiators

so it runs cooler and lasts longer than other V-belts

Flange diameter: 43

Dayco Automatic Belt Tensioner 89426 Moly MC-4ST 10W-40 is a superiorDayco No Slack Automatic Belt Tensioner is designed to maintain constant tension on serpentine belt drives. The serpentine belt drives consist of a single belt that powers most, if not all, of the engine's accessories. To maintain the proper tension throughout the drive, an automatic, spring loaded tensioner is incorporated into the drive system geometry. Dayco's Automatic Belt Tensioner features a patented "flat spring" design that's engineered to