I have a 2000 superduty with manual lockers (stock), and I can say "they suck". Left me at the gravel boat launch with mashed plastic crapola parts in the lockers. Limped out and made her home to find about 50000000 little pieces of plastic in the locker, or what was left of the locker. Replaced with WARN lockers this am. Will let you know how they work out. Super simple instal.