Get the most out of your Ford F-250 / F-350 with Rough Country's Front CV Driveshaft! This extended drive shaft is designed to promote a better geometry on any Super Duty with a 4.5in - 6in suspension lift. This upgrade helps eliminate vibration issues and is much more durable than the factory shaft operating on a lifted vehicle.Collapsed Measurment: 36 inches Extended Measurment: 39 1/2 inches Reduces drive line vibrations Includes better quality CV joints. Shaft strength is twice as strong as the factory equipped drive shaft. Works on Ford F-250 / F-350 with 4.5in - 6in of lift ONLY. Does NOT fit gas models.2-3 hourshttps://s3.amazonaws.com/roughcountry/install/92RC5068.pdf2017-2022:4WD:Ford:F-250 Super Duty;2017-2022:4WD:Ford:F-350 Super Duty