Poly-V Belt Kits Belts Poly-V Belt Kits Poly-V belt with tensioner and idlers – a complete accessory drive kit. Renewing the tensioner and idlers together with the belt keeps the accessory drive at the correct tension and free of vibration. Kits supply every matching part in one pack. Brands DAYCO Online catalogue B4B login Contact us → Related product groupsAll product groups → Poly-V Belts V-Belts Crankshaft Pulleys