Looking for a hard tonneau cover for your 2021-2026 Ford F-150 and Raptor, 2022-2026 F-150 Lightning with a 5'7" bed? The BAKFlip MX4 TS (Gen 3) Hard Folding Tonneau Cover with T-Slot Rails, part number 449339TS, 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 BAKFlip MX4 TS keeps everything good about the Gen 3 MX4 and adds T-slot rails for mounting gear on top.
F-150 owners use the bed for work and weekends alike, and a cover that locks, seals and still gives you the whole bed when you need it fits both.
Rack-ready from day one. T-slot channels in the side rails take racks, cargo holders, tents and cross bars, all sold separately. You get a hard folding cover and a place to carry gear above it.
Finished to take a beating. Textured matte black with BAK's Multi-Shield coating guards against scratches, dents and UV, and the low-profile fit keeps the cover close to the rails.
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.
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.
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.
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.
Assembled in the USA and covered by a five-year limited warranty, the BAK 449339TS is the Gen 3 upgrade for owners who want a stronger, tighter-sealing folding cover. Order it from Track Ready Products and check the bed length above.
Installation is a one-person, bolt-on job with a click-in design that is 12% quicker than the previous generation. Most trucks need no drilling or trimming.
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.
After the first week of driving, recheck the clamps and retention hardware for tightness, and check them again now and then. Wash with mild automotive soap and water, keep the cover secured at all points while driving, and clear snow and ice before opening.
