The BAK BAKFlip MX4 is a hard-folding aluminum tonneau cover for the 2020-2026 Chevrolet Silverado 2500/3500 HD & GMC Sierra 2500/3500 HD with the 8ft 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: 8ft
- Part number: BAK448134
Vehicle Applications
Fits the 8ft bed on the following:
- 2020 Chevrolet Silverado 2500 HD
- 2021 Chevrolet Silverado 2500 HD
- 2022 Chevrolet Silverado 2500 HD
- 2023 Chevrolet Silverado 2500 HD
- 2024 Chevrolet Silverado 2500 HD
- 2025 Chevrolet Silverado 2500 HD
- 2026 Chevrolet Silverado 2500 HD
- 2020 Chevrolet Silverado 3500 HD
- 2021 Chevrolet Silverado 3500 HD
- 2022 Chevrolet Silverado 3500 HD
- 2023 Chevrolet Silverado 3500 HD
- 2024 Chevrolet Silverado 3500 HD
- 2025 Chevrolet Silverado 3500 HD
- 2026 Chevrolet Silverado 3500 HD
- 2020 GMC Sierra 2500 HD
- 2021 GMC Sierra 2500 HD
- 2022 GMC Sierra 2500 HD
- 2023 GMC Sierra 2500 HD
- 2024 GMC Sierra 2500 HD
- 2025 GMC Sierra 2500 HD
- 2026 GMC Sierra 2500 HD
- 2020 GMC Sierra 3500 HD
- 2021 GMC Sierra 3500 HD
- 2022 GMC Sierra 3500 HD
- 2023 GMC Sierra 3500 HD
- 2024 GMC Sierra 3500 HD
- 2025 GMC Sierra 3500 HD
- 2026 GMC Sierra 3500 HD
FAQ
What is the BAK BAKFlip MX4?
It is a hard-folding aluminum tonneau cover with a textured matte black finish for the 2020-2026 Chevy Silverado 2500/3500 HD & GMC Sierra 2500/3500 HD with the 8ft 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.
