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RealTruck

RealTruck BAK BAKFlip MX4 Hard Folding Truck Bed Tonneau Cover | 448227 | Fits 2019-2026 Dodge Ram 1500, Does Not Fit w/Multi-Function (Split) Tailgate 5' 7" Bed (67.4")

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Condition: New
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Availability: In Stock.
Fulfilled by Amazon
Arrives Jul 14 – Jul 15
Order within 18 hours and 47 minutes
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Style: MX4: America’s Top Seller


Size: 5' 7" Bed


Configuration: 2019 - 2022 New Body Style


Features

  • Fits 2019 - 2026 Dodge Ram 1500, Does Not Fit w/ Multi-Function (Split) Tailgate 5' 7" Bed (67.4")
  • 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: MX4 America’s Top Seller


Exterior Finish: Aluminum


Material: Aluminum


Lock Type: Tailgate


Brand Name: RealTruck


Manufacturer Part Number: 448227


Manufacturer: BAK


UPC: 192631005735


Automotive Fit Type: Vehicle Specific Fit


OEM Equivalent Part Number: 448227


Global Trade Identification Number: 35


Model Number: 448227


Unit Count: 1.0 Count


Included Components: Truck Bed Cover^Side Rails (2)^Hardware Pack


Manufacturer Warranty Description: 3 Year Warranty


Item Type Name: Hard Folding Truck Bed Tonneau Cover


Item Weight: 71 Pounds


Material Type: Aluminum


Lock Type: Tailgate


Style Name: MX4 America’s Top Seller


Exterior Finish: Aluminum


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Jul 14 – Jul 15

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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Similar Products

Top Amazon Reviews

    • A solid, folding tonneau cover. A solid, folding tonneau cover.
Style: BAKFlip MX4 Size: 5' 7" Bed
Review Image by nc_beagle
I did a lot of research before settling on this cover. As with most things, you see people who had problems and people who have had none. Here are my overall observations. * I did get a little water infiltration after a hard rain, but haven't made any adjustments since I installed it, so the leak could be my fault. * Installation is pretty easy. I did it myself in a Ram 1500 crew cab with the 5'7" bed--no RamBox. It maybe took 30 minutes, some of which was spent watching a YouTube installation video. * It looks great. * I love that you can open and close the tailgate with the cover closed. * I've had it in the folded position, going 70mph on the interstate and it held up fine. Only a small bit pokes out from behind the cab of the truck to catch the wind. I will note, though, that had I not had the digital rear view mirror (there's a camera in my third brake light that projects to my mirror) I would not have been able to see through the back window with the cover folded upright. * The cover gets very hot in direct sunlight. I especially found this out during installation. Might want to park in the shade while installing. I can't speak to customer service, etc..., but will try to keep this review updated since this is a high-ticket item and people like me want to get all the information they can before committing. I wasn't sure how to rate the value for the money, but since few of these covers are cheap, it felt like I am getting a well-made product at a cost comparable to other brands. Follow up after several months of use. I've had it parked in and driven during some hard rains and had very minimal to no water infiltration. I will note that when it's parked outside at our house, it is on a slight incline, such that the tailgate is lower than the cab, so that could conceivably make it less likely for water to get into the bed area? The cover continues to perform very well. ... show more
Reviewed in the United States on August 9, 2021 Reviewed in the United States on August 9, 2021 by nc_beagle
    • Sleek and Useful Sleek and Useful
Style: BAKFlip MX4 Size: 5' 7" Bed
Review Image by Jacob D. Kettle
Review Image by Jacob D. Kettle
Review Image by Jacob D. Kettle
So far the tonneau cover is working out fine. It is a value for the money compared to other covers. It fit perfectly on the truck, instructions were not great but you can figure it out fairly easily. Seems to be weather proof. It has rained and stormed out here in Arizona several times since I installed. It folds up easily , love the peg stands that hold the cover up. Very nice looking cover , almost can’t tell it’s there. Also the inside stays pretty dry in the truck wash, I did notice some wetness in the corners by the cab. Not a lot of water but a little bit. Maybe can add more sealant to prevent the slight leakage. ... show more
Reviewed in the United States on October 21, 2025 Reviewed in the United States on October 21, 2025 by Jacob D. Kettle
    • Costs a little more, but worth it.
Style: BAKFlip MX4 Size: 5' 7" Bed
Easy to install. It took about 2 hours to install. 2 people could easily install it in about 1 hour. My previous truck had a BAK hard roll-up, which was great. But the vinyl covering cracked. They replaced it under warranty, though. I went with this BakFlip aluminum cover because it has no vinyl covering to crack or tear. It also costs less. The panels flip up easily. The fit and finish are good. Most covers leak a little at the corners. Even in a major rain storm, there was only minor leakage, but I deducted 1 star for that. It looks great! ... show more
Reviewed in the United States on May 8, 2026 by Bob J
    • Awesome cover!
Style: BAKFlip MX4 Size: 5' 7" Bed
Extremely fast shipping, and it arrived a day earlier than it was previously reported. The cover came with a QR code, and an alternative website link for video instructions, which are easy to follow. It took less than an hour to assemble. Clearly a very durable cover, which I had on my previous 2017 Ram 1500 before trading it in, which is why chose the same cover again, as the old cover was still in great condition. I noted that some modifications were made to the newer cover, which I view as a huge win, such as a gutter system on the side rails which ensures the bed compartment won't be compromised with water. Also, better seals were observed on the new cover. Extremely easy to open, and I paid less for this cover than I did in 2017 for my old cover. Finally, the cover fit like a glove on my 2025 Ram 1500 Laramie Crew cab, worth every penny! ... show more
Reviewed in the United States on March 12, 2025 by Duane M
    • Solid fit, some leaking, but nothing major
Style: BAKFlip MX4 Size: 5' 7" Bed
Installed on a Ram 1500 Bighorn. Easy to install, just make sure to snap the clamps into the track to get a solid fit. That part seemed to be left out in the online videos I watched, however it might be in the instructions, which of course I did not read. Some leaking around the rear bed corners when I took it through the car wash, but not too bad. Ram trucks have a gap in the tailgate, so I was expecting that to leak some, which it did, but overall, not too bad. I would rate this water resistant, but not waterproof. ... show more
Reviewed in the United States on May 7, 2026 by RM
    • MX4 Review: Waterproof in the Same Way a Screen Door Is MX4 Review: Waterproof in the Same Way a Screen Door Is
Style: BAKFlip MX4 Size: 5' 7" Bed
Review Image by Landon
Review Image by Landon
Review Image by Landon
Review Image by Landon
Review Image by Landon
This MX4 is one of the most overhyped products I have ever bought. Save your money and buy literally anything else. Use a tarp. Use cardboard. It might actually seal better. My cover showed up already damaged. A cracked drain piece. Whatever. I contacted RealTruck and they sent replacements. Great. Except that ended up being the highlight of the entire experience. The real problem is the leaking. This thing leaks like it is trying to put out a fire inside the bed. Water comes through every panel. Not a little drip. I mean it may as well not even be on the truck. I sent RealTruck a video and they agreed it was not normal and offered a new top. That replacement top arrived destroyed too. They shipped it in a box big enough to fit a refrigerator so it bounced around, bent a panel, and snapped clips. So the replacement was actually worse than the original. Impressive, honestly. Amazon gave me thirty percent back and even at seven hundred dollars this thing is still not worth keeping. It looks good, the latches are nice, and that is where the compliments end. Even the tailgate seal barely touches the tailgate. It is like it is not even trying. To add to the comedy, the replacement drain pieces they sent were the wrong size. Every time I emailed, the reply felt like a panic reaction rather than someone actually fixing anything. When I told them the replacement top was broken and the drain pieces were wrong, they basically said sorry, paint a spot on the top and send a picture and we will send another top. At what point do you send a complete kit that is not broken. Pros Looks good Nice latches Easy install Cons Everything else ... show more
Reviewed in the United States on December 8, 2025 Reviewed in the United States on December 8, 2025 by Landon
    • Great bed cover
Style: BAKFlip MX4 Size: 5' 7" Bed
Works great. Easy to install.
Reviewed in the United States on March 9, 2026 by Flick
    • Great look and fit 2026 Ram 1500 Great look and fit 2026 Ram 1500
Style: BAKFlip MX4 Size: 5' 7" Bed
Review Image by William S
Fits and looks great on my 2026 Ram 1500. Installation fairly easy with two people after watching the video a couple of times. Never could locate written instructions. Have not run it through a car wash to check water tightness, but bed was dry after a couple of rain events. Very pleased with my purchase. ... show more
Reviewed in the United States on April 6, 2026 Reviewed in the United States on April 6, 2026 by William S

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