Looking for a hard tonneau cover for your 2021-2026 Ford F-150 with an 8' bed? The BAKFlip MX4 (Gen 3) Hard Folding Tonneau Cover, part number 448338, is cut for that application. It folds forward against the cab for full bed access, then closes and locks to protect what you carry.
The MX4 is the premium BAKFlip, and the Gen 3 update improves strength, sealing, latching and install speed over earlier versions.
The F-150 bed does a lot of different jobs. A hard cover protects the cargo on the way, and opens fully for the jobs that need the space.
Sealed against the weather. Revised EPDM rubber perimeter seals and tight-fit clamps close the gap between the cover and the bed rails, and the dual-action tailgate seal, available on most applications, is 13% longer than before. An integrated drainage system carries water away.
Heavy-duty where it counts. Multi-layer aluminum panels, a high-density polymer core and precision-engineered side rails make this Gen 3 cover 22% stronger than the original MX4, with a 400 lb evenly distributed load rating.
A low, tidy profile. Textured matte black on every component and a flush fit with the rails make the cover look like it belongs on the truck.
Fold it up and haul. The cover folds forward and upright against the cab, with prop rod clips holding it in place and rubber bumpers protecting the cab. You can drive with it folded open, and the third brake light is not blocked in any position.
Close it and walk away. The auto-latch does the locking, and the re-engineered lock components give this generation better resistance to forced entry than the last.
For a folding cover that locks itself, seals tight and fits flush, the BAK 448338 is a strong choice. It is assembled in the USA, backed by a five-year limited warranty, and available from Track Ready Products.
The Gen 3 click-in mounting makes this a one-person job, typically 30 minutes or less, with no cutting, trimming or drilling on most trucks. Clamps and hardware are included.
Wipe down the rails, seat the cover, then snug the clamps a little at a time on both sides so it pulls down square. Test the latch and the open and close action while the bed is still empty.
Recheck the clamps after about a week, wash with mild automotive soap and water, and clear off snow and ice before opening. Keep the cover secured at all points whenever you drive.
