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RealTruck

RealTruck BAK BAKFlip MX4 Hard Folding Truck Bed Tonneau Cover | 448331 | Fits 2017-2026 Ford F-250/350 Super Duty 8' 2" Bed (98.1")

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Availability: In Stock.
Fulfilled by 4Wheel Online
Arrives Thursday, Mar 26
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Style: BAKFlip MX4


Size: 8' 2" Bed


Features

  • Fits 2017 - 2026 Ford F-250/350 Super Duty 8' 2" Bed (98.1")
  • THE BEST-SELLING TRUCK BED COVER IN THE WORLD JUST GOT BETTER
  • NOW EVEN MORE SECURE THAN GEN 2 | The new BAKFlip MX4 comes with an updated design tested to keep your gear on theft-resistant lockdown with a patented and upgraded auto-latch locking system.
  • FITS TIGHTER TO KEEP WATER OUT | Improved seals and all-new tight-fit clamps provide state-of-the-art weather protection.
  • PROVEN FOR EXTREMES FROM ALASKA TO FLORIDA | Tested in the harshest conditionsfrom -40 to 180F and zero to 95% humidityand guaranteed by a 5-year warranty.
  • NO WASTED BED SPACE, PARKED OR DRIVING | 100% bed access. All the time. Simply fold to the cab, easily secure, and safely drive with the cover fully open.

Description

America’s best-selling truck bed cover just got even better.Introducing the BAKFlip MX4 Gen 3—the latest evolution of RealTruck’s most popular tonneau cover. Now better than ever, the BAK has redesigned the for improved strength, security, and all-weather performance. The Gen 3 MX4 features alloy-based construction, including heavy-duty aluminum side rails and top panels, reinforced with high-density polymer cores. This updated design delivers a 22 percent increase in strength over the previous generation, making it even more capable of handling daily use, heavy loads, and harsh environments. Security has also been upgraded. BAK’s patented auto-latching system secures the cover automatically when closed. Newly engineered lock components provide added resistance to tampering and forced entry, allowing you to transport your gear with confidence. In rough weather, the Gen 3 MX4 holds strong. Revised EPDM perimeter seals and tight-fit clamps offer the best seal yet, helping prevent water intrusion along the bed rails. A longer dual-action tailgate seal weatherproofs the tailgate while preserving full functionality, whether the cover is open or closed. While the MX4 is built tough, it doesn’t compromise on looks. The flush-mount design gives it a sleek, low-profile appearance, while a textured matte-black finish across all surfaces delivers a clean, subtle aesthetic. Installation is easier than ever with a new click-in rail system that cuts install time by up to 12 percent. Day-to-day use is just as simple—drop the tailgate, unlatch, and fold the cover forward. For complete bed access, fold the cover against the cab without blocking your third brake light. The BAKFlip MX4 Gen 3 is proudly assembled in Missouri using globally sourced materials and backed by a 5-year warranty.

Brand: RealTruck


Style: BAKFlip MX4


Exterior Finish: Aluminum


Material: Aluminum


Lock Type: Tailgate


Brand: ‎RealTruck


Style: ‎BAKFlip MX4


Exterior Finish: ‎Aluminum


Material: ‎Aluminum


Lock Type: ‎Tailgate


Manufacturer: ‎Bak


UPC: ‎819275031141 819275042390 605994513866


Automotive Fit Type: ‎Vehicle Specific Fit


OEM Part Number: ‎448331


Global Trade Identification Number: ‎90


Model: ‎BAKFlip MX4


Item Weight: ‎71 pounds


Product Dimensions: ‎69 x 23 x 8.5 inches


Item model number: ‎448331


Is Discontinued By Manufacturer: ‎No


Manufacturer Part Number: ‎448331


Date First Available: August 25, 2016


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Thursday, Mar 26

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Similar Products

Top Amazon Reviews

    • Ford F-450 Platinum, near perfect fit, worth $$$
Style: BAKFlip MX4 Size: 8' 2" Bed
Excellent product, near perfect fit. - All hardware is well engineered and sturdy. - Flush fit, looks great. - Top is very strong. - No documentation regarding the 8’ bed rail connectors, closeup and printed insert in package would be helpful - A closeup of the clip in rail insert geometry closeup, printed insert in package would be would helpful. I’d give 4stars but the dam thing is so cool, it works fantastic with my Ford F-450 Platinum. *** It’s worth the BIG $$$ THANKS. ... show more
Reviewed in the United States on January 27, 2026 by Mr T
    • High quality product
Style: BAKFlip MX4 Size: 6' 10" Bed
This product is awesome. Love the fit, how it looks on my truck and the overall quality. This product is fairly straightforward on installation recommend two people as it is much easier with two.
Reviewed in the United States on December 27, 2025 by Jim Warick
    • Great support and product.
Style: BAKFlip MX4 Size: 6' 10" Bed
Review Image by PT PT
Review Image by PT PT
Easy to install. Fits well. Durable. Great support. I’ve had this over a year now. The only issue I had was one of the plastic corners fell off which Bakflip replaced immediately. On the install, you need to ensure the brackets are exactly at a right angle to the bed. This takes a bit of adjusting otherwise the back locks won’t clip. My suggestion would be to increase the latch clearance a bit. I had issues with getting one side to latch but after using it for a bit, now both sides latch when I close the cover. ... show more
Reviewed in the United States on September 17, 2025 by PT PT
    • Unsafe, needs propping up, and/or flimsy.
Style: BAKFlip MX4 Size: 8' 2" Bed
I don't care for the clamping system that is used, they utilize the grip of the clamp to hold the rails (and thus the entire tonneau cover) to the truck bed. The clamps otherwise are not physically attached to the rails, and if the nuts happen to vibrate loose just a little, the clamps literally fall to the floor of the bed. Murphy's Law, if it can happen, it will happen... They say it never has, but I can't in good conciousness leave my driveway with it on. From there, because I made sure the clamps were tight, the rails are slightly past vertical (even with the angle shims that were attached), so there are resulting alignment problems with the top, and it has to be worked to open, fold, unfold, and close. And I wouldn't dare loosen the nuts on the aforementioned rail clamps to get it better aligned... The little pad strips that are included are imo insufficient to protect the back window and third brake light (it's cheap, and doesn't cover the contact points adequately or at all). I'd feel compelled to get a large piece of foam to cover the back window and strap it somehow to the cover. And btw, it does block most of the third brake light. The prop rods in and of themselves are ok, but the attachment/adjustment point sucks. Once put into position and tightened, it will move if you apply some pressure to it. How tight do you have to get it before it strips out...? This is something that would be used repeatedly, No intention to be negative here as I'd prefer to be writing a positive review. But if I'm buying something at this price, I certainly do not want to be having to figure out how to modify it to make it safe and secure, or to prop it up so that it works as advertised, and doesn't break out my back window, all on DAY ONE... ... show more
Reviewed in the United States on May 19, 2022 by Bubba Gump
    • Easy to install. Impressed with the fit on my F250.
Style: BAKFlip MX4 Size: 6' 10" Bed
Review Image by Dobster Dobster
Really nice fit. Easy to install. I like that it cannot be opened without opening the tailgate. If your tailgate locks, the cover will be secure. No cover is completely water tight. Have not tested it with a wash or rain yet but judging from how it looks, I bet this is one of the best covers when it comes to keeping your cargo dry. Looks great on the truck. Very happy with my purchase. Plus saved $100 by purchasing on Amazon vs one of the other online truck accessory dealers. For installation, read the printed directions AND watch the YouTube video. It’s only 7 minutes long but will insure a perfect fit. I rarely do reviews. But this one ranked 5 stars!! Thank you BAK Industries for a nice product! ... show more
Reviewed in the United States on December 6, 2023 by Dobster Dobster
    • Cover is great, instructions stink
Style: BAKFlip MX4 Size: 8' 2" Bed
This product is great! I had it on my last truck, so I knew I wanted another for my new truck. It says you can install the cover in 30 minutes. This is true, but not if you follow the included instructions. They are pretty terrible. After watching a YouTube video, it was actually a piece of cake, and the cover is working fantastic. ... show more
Reviewed in the United States on September 2, 2025 by Adam K.
    • Installation on a 2025 F-350 short bed
Style: BAKFlip MX4 Size: 6' 10" Bed
Cover arrived damage free. Installation was under an hour by myself. At first the clamps annoyed me and I thought I needed another hand. However, and in regards to the review that says its terrible and if loosened the clamps will just fall off, not true. What took a minute to figure out, and comparing to other clamp rail type covers I've installed, the aluminum clamps will snap into the rails. Once you figure out where to install them, "roll" them into place and they will snap into the track and stay there. This also frees up from needing a 3rd hand. Until the clamps start getting pretty tight, the rails will sit on an angle. This also had me baffled at first as I was trying to keep the rails level and as soon as I started tightening the rails would lean in badly. Once it starts getting tight, the rails will level out. Take your time, be patient, its not a hard install and looks great when complete. Oh also, until you get it really tight and the rails straighten out, the latches will not catch. So if your latches dont catch, check your rails and be sure they are level on top. Quality seems nice, looks incredibly clean, folds easily, latches nicely and feels very solid. However, mine, even after a re-install just to try, is the furthest from watertight. The next amount of wetness would be no cover at all. My entire bed was soaked after a hard Florida rain while truck was parked. This makes it hard to decide if I'd buy one again or do another soft roll up that seem way more waterproof than a cover that is 4 times the cost. But the BAK is far more secure. So, leaking is my reason for 3 stars. If it was 95% dry like my soft cover, it would no doubt be a 5 star cover. ... show more
Reviewed in the United States on August 21, 2025 by Scott

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