Keep your 4WD system functioning properly with this OEM Genuine Front Locking Hub Vacuum Lines Assembly for 2011–2016 Ford Super Duty PowerStroke Diesel models, part number BC3Z-3C124-A. Specifically designed for 4WD-equipped F-250, F-350, and F-450 trucks with the PowerStroke Diesel engine, this vacuum line assembly ensures proper engagement of the front locking hubs. If you're experiencing 4x4 engagement issues or vacuum leaks, this direct-fit Ford replacement restores factory performance and reliability. Built to handle the demands of heavy-duty applications, it installs easily with no modifications required.