Boxed Serpentine Kits make it easy to restore the entire accessory belt drive system. Eliminate customer comebacks by fixing the vehicle the first time by servicing the entire serpentine drive. Neglecting to replace the tensioner and pulley(s) at the same time you replace the belt can ultimately shorten the life of the belt as well as other front-end accessory components. Each kit contains an OE-equivalent belt, tensioner, idler pulley and necessary hardware with installation instructions and tech tips for easy, accurate installation for virtually every vehicle on the road today.