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RealTruck BAK BAKFlip MX4 Hard Folding Truck Bed Tonneau Cover | 448226 | Fits 2020-2026 Ram 1500 (New Body Style) Works with Multi-Function (Splitgate) Tailgate 5' 7" Bed (66.75")

  • Based on 13 reviews
Condition: New
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Availability: In Stock.
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Arrives Wednesday, Apr 29
Order within 19 hours and 32 minutes
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Style: BAKFlip MX4


Size: 5' 7" Bed


Features

  • Fits 2020 - 2026 Ram 1500 (New Body Style) Works With Multi-function (Splitgate) Tailgate 5' 7" Bed (66.75")
  • 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: ‎192631034346


Automotive Fit Type: ‎Vehicle Specific Fit


Global Trade Identification Number: ‎46


Model: ‎MX4


Item Weight: ‎58.9 pounds


Product Dimensions: ‎68 x 24 x 23 inches


Item model number: ‎448226


Manufacturer Part Number: ‎448226


Date First Available: October 13, 2022


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Wednesday, Apr 29

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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Top Amazon Reviews


  • Works with OEM brackets on my RAM 1500 Rebel with multi-function tailgate!
Style: BAKFlip MX4 Size: 5' 7" Bed
Everything that I saw for the RAM trucks with the split tailgate said that aftermarket brackets were NECESSARY to install a bedcover, and unfortunately, I ordered them. If you have the split tailgate, save yourself some money and time, and just go with this bedcover. It even utilizes the OEM brackets in the bedcover install. I'm giving it 5 stars because it looks beautiful on my truck, like it was made perfectly for it, which it was! It took my husband and me about an hour to install, and it went pretty seamlessly. I'm not expecting it to be 100% waterproof, especially because of the gap between the tailgate split (pictured), but I believe things will stay mostly dry especially near the cab where this cover comes with a drainage system. Barring any torrential leakage when I get out in the rain, I'll leave this review at 5 stars. ... show more
Reviewed in the United States on December 23, 2023 by Brittany P. Brittany P.

  • Excellent Product but poor Quality Control
Style: BAKFlip F1 Size: 5' 7" Bed
Recieved Product intact in box, However the Drain Cups were missing which was dissapointing considering i tried ordering similar product directly from RealTruck but never recieved it. It pained me to call them again after I canceled my order originally from them for I never recieved the item and not knowing when item will be shipped, but kept telling me same story over and over again and than finally I got tired of waiting and cancled my order online with them and called them to refund my money and i have been waiting now for over a week and still not credited, so i ordered the F1 model because Amazon had it in stock and recieved it in a couple days but to find out missing drain cups, hence the pain on calling Realtruck and forwarded to BAK for missing parts and waiting on the phone for over an hour. Good news i recieved the Drain Cups which i was shocked to see them come in after 3 days. So the product itself is awesome easy to install and i would give it 5 stars if it wasn't for the missing parts. ... show more
Reviewed in the United States on June 27, 2025 by AuZZie

  • Bed for the Ram Multi-Function Tailgate.
Style: BAKFlip MX4 Size: 5' 7" Bed
I ordered this truck bed because the the looks and the fact it works on the multi function tailgate. It is awesome! It fit on my 2023 limited and it looks sharp. The cover comes with drain system so you do not end up with water in the bed. Each panel can be folded up and locks between each panel. If I had a small item I can just unlock one panel. Compared to other bed covers on the market, this one was affordable and is made well. ... show more
Reviewed in the United States on July 25, 2025 by Vic

  • Bad customer support
Style: BAKFlip MX4 Size: 5' 7" Bed
Product is fine. Not perfect for Ram rebel with MFT. Customer support is terrible. Have been waiting 3 weeks for missing parts.
Reviewed in the United States on May 7, 2025 by Lawrence Cullari

  • Bed cover
Style: BAKFlip G2 Size: 6' 4" Bed
The cover fits great, easy to install looks beautiful, as you can see its been raining here no leaks.
Reviewed in the United States on October 4, 2025 by Billy Anderson Billy Anderson

  • redesign your product before you sell it
Style: BAKFlip MX4 Size: 5' 7" Bed
would not work on my 2023 ram truck.even though it was made to fit my truck with the corner brackets it still would not fit.The rail system i noticed is not as good as the one i had on my 2022 ram limited.it appears like its cheaply made.I would not buy again.
Reviewed in the United States on April 26, 2025 by howard l

  • Great Quality But Not Long Enough
Style: BAKFlip MX4 Size: 5' 7" Bed
Great quality but too much water gets in the truck bed.
Reviewed in the United States on April 6, 2024 by Recruiter83

  • Get it
Style: BAKFlip MX4 Size: 6' 4" Bed
Loved it
Reviewed in the United States on December 1, 2025 by Phil

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