The BOSCH OEM Driver Side New Fuel Rail for the Powerstroke 6.7L engine is the same high-quality component you’d receive from a dealer and includes a 1-year unlimited-mileage warranty. To ensure the longevity of your new injectors, it is recommended to replace old rails, as reusing them can lead to contamination and potential damage to the injectors. This product is sold individually for the driver side only.