BAKFlip MX4 hard folding tonneau cover

RealTruck sells the current MX4 as the Gen 3 (checked 1 October 2026), and we order the newest version made for your truck. Its aluminum top panels have high-density polymer cores, and RealTruck rates them 22 percent stronger than the original MX4. Closed, the cover is rated for 400 lb, evenly distributed. That rating is for weight spread across the cover, not for standing, sitting or setting a heavy point load on it.

The textured matte black finish sits nearly flush with the rails, so it changes the look of the truck very little, whether that is a daily-driven F-150, a work truck or a built Super Duty.

A traditional tonneau cover can get in the way when you suddenly need your truck to do truck things. With the MX4 you open only as much of the bed as you need. The panels fold toward the cab in sections, and when you need all of it, the cover folds up against the cab, secures in place and stays there while you drive. RealTruck calls it 100 percent bed access.

Closed. Partly open. Full bed access. Open only as much of the MX4 as you need.

The hard panels and automatic latches keep what is in the bed out of sight and harder to get at. With the cover closed and the tailgate locked, the release mechanisms sit inside the bed. That makes the MX4 a good fit for tools, equipment, luggage, golf clubs and camping gear. It adds real security to the bed; no tonneau cover is theft-proof.

Snow, rain, road grime, dust and weather that changes by the hour are all reasons to keep cargo covered in Colorado. The Gen 3 has redesigned EPDM perimeter seals, tight-fit clamps, an integrated drainage system and, on most trucks, a longer dual-action tailgate seal. It is built to give very good weather protection, but no tonneau cover should be expected to keep a bed completely dry in every condition. Small amounts of water can get in during heavy rain, in a car wash or in extreme weather. We would rather say that before the sale.

In winter, clear snow and ice off the cover before you open it. In normal Front Range use, major winter problems are not typical, though extreme snow, ice or cold can affect any cover with moving parts. For seal and latch care, follow BAK's current guidance.

Want to carry bikes, skis, kayaks, a cargo basket or a rooftop tent above the bed? Look at the MX4 TS. It is the same cover with T-slot rails that take compatible racks, crossbars, cargo holders and tents. Tell us before you choose a cover, because not every cover or truck offers the same options.

On trucks where both fit, the MX4 and a DECKED drawer system work well together: the cover secures and protects the top of the bed, and the drawers organize everything underneath. We sell and install both, so we check the fit and build the system together.

The hard panels, bed security and quick full-bed access also make the MX4 a strong choice for contractors, technicians and fleet trucks, and it can be part of a bigger work-truck build with a headache rack or other accessories. Compatibility varies by truck and accessory, so we verify the complete setup before ordering.

The MX4 is made for most common trucks, including the Ford F-150 and Super Duty, the Chevrolet Silverado, Ram trucks and the Toyota Tacoma.

Exact availability depends on the model year, bed length and bed configuration. Send us your year, make, model and bed length and we will confirm the right MX4 for your truck, check it against the accessories you already have, and get you current pricing.