The BAK BAKFlip MX4 is a hard-folding aluminum tonneau cover for the 2021-2026 Ford F-150/F-150 Lightning with the 5.7ft bed. Its heavy-duty aluminum top panels are reinforced with high-density polymer cores for a 22 percent strength increase over the original MX4, and a patented automatic latching system secures the cover when it is closed. EPDM perimeter seals, tight-fit clamps and a dual-action tailgate seal keep water out, and the panels fold flush against the cab for full bed access. It installs on the factory bed with no drilling.
- Type: hard-folding tonneau cover
- Construction: heavy-duty aluminum top panels with high-density polymer cores, 22 percent stronger than the original MX4
- Finish: textured matte black
- Security: patented automatic latching system
- Weather protection: EPDM perimeter seals, tight-fit clamps and a dual-action tailgate seal
- Weight capacity: 400 lbs evenly distributed
- Bed access: folds flush against the cab for 100 percent bed access
- Install: one-person, no-drill
- Warranty: 5-year
- Bed length: 5.7ft
- Part number: BAK448339
Vehicle Applications
Fits the 5.7ft bed on the following:
- 2021 Ford F-150
- 2022 Ford F-150
- 2023 Ford F-150
- 2024 Ford F-150
- 2025 Ford F-150
- 2026 Ford F-150
- 2022 Ford F-150 Lightning
- 2023 Ford F-150 Lightning
- 2024 Ford F-150 Lightning
- 2025 Ford F-150 Lightning
- 2026 Ford F-150 Lightning
FAQ
What is the BAK BAKFlip MX4?
It is a hard-folding aluminum tonneau cover with a textured matte black finish for the 2021-2026 Ford F-150/F-150 Lightning with the 5.7ft bed.
Can I still use the full bed?
Yes. The panels fold flush against the cab for 100 percent bed access, and the closed cover holds up to 400 lbs evenly distributed.
Is it weatherproof?
It uses EPDM perimeter seals, tight-fit clamps and a dual-action tailgate seal to keep water out.
Does it require drilling to install?
No. It is a one-person, no-drill installation that clamps to the factory bed rails.
