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RealTruck

RealTruck BAK BAKFlip MX4 Hard Folding Truck Bed Tonneau Cover | 448133 | Fits 2020-2026 Chevy/GMC Silverado/Sierra 2500/3500 6' 10" Bed (82.2")

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Availability: 18 left in stock
Fulfilled by US Auto Gear
Arrives Saturday, Mar 28
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Style: BAKFlip MX4


Size: 6' 10" Bed


Features

  • Fits 2020 - 2026 Chevy/GMC Silverado/Sierra 2500/3500 6' 10" Bed (82.2")
  • 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: ‎192631030355


Automotive Fit Type: ‎Vehicle Specific Fit


Global Trade Identification Number: ‎55


Model: ‎BAKFlip MX4


Item Weight: ‎71 pounds


Product Dimensions: ‎68 x 8 x 23 inches


Item model number: ‎448133


Manufacturer Part Number: ‎448133


Date First Available: September 5, 2019


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Saturday, Mar 28

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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  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Similar Products

Top Amazon Reviews

    • Highly recommended!
Style: BAKFlip MX4 Size: 6' 10" Bed
The RealTruck BAKFlip MX4 Hard Folding Truck Bed Tonneau Cover is the ultimate upgrade for any truck owner looking to enhance both functionality and style! This cover is as tough as it looks, made from durable, weather-resistant materials that can handle anything Mother Nature throws its way. The hard folding design provides easy access to your truck bed, allowing you to quickly stow away gear without having to fully remove the cover—perfect for those spontaneous adventures! Installation is a breeze, typically taking less than an hour, and it fits snugly without any drilling required. Plus, it adds a sleek, streamlined appearance to your truck, turning heads wherever you go. The MX4's integrated security features give peace of mind, ensuring your valuable cargo is protected from prying eyes (and hands). If you want a tonneau cover that combines rugged durability with practical design, the RealTruck BAKFlip MX4 is a no-brainer—it's like a protective shield for your truck bed that looks great while doing its job! ... show more
Reviewed in the United States on September 29, 2024 by KJ
    • BakFlip cover
Style: BAKFlip F1 Size: 6' 10" Bed
Excellent cover solution for Silverado 2500. Easy install and very durable. Good fit to the bed, secures items from theft, and opens up enough to haul big items. The rubber seals provided did not seal perfectly but some McGuiver work with additional material sealed it well.
Reviewed in the United States on December 16, 2024 by David R.
    • Still the Best Bed Cover – Worth Every Penny!
Style: BAKFlip MX4 Size: 6' 10" Bed
⭐⭐⭐⭐⭐ This is my second purchase after switching trucks, and I still absolutely love this bed cover! The design is fantastic, and I can’t imagine ever switching to any other style. Highly recommended!
Reviewed in the United States on November 12, 2025 by Philip Hayden
    • Good buy for the money.
Style: BAKFlip MX4 Size: 6' 10" Bed
This is the second BAKFlip cover that I have purchased. The first was for a 2015 Chevy Silverado 2500. It lasted for the 10 years that kept the truck with a small amount of wear and tear. I only gave this one 4 stars because it is much lighter and doesn't have the heavy duty feel the first one did. Also, I don't feel this one has the security the first one did. The previous one had a bar across the width of the lid blocking access to the delatching wire. This one does not. The installation instructions are detailed and easy to understand. It's a good fit on my 2025 Chevy Silverado 2500HD. I would recommend purchasing this item. ... show more
Reviewed in the United States on October 14, 2025 by Larry P.
    • Love it!
Style: BAKFlip MX4 Size: 6' 10" Bed
I love this cover for my truck. I debated on what to get and this one is perfect. It was fairly easy to install myself and I am what I would call moderately handy. I installed it just before a beach trip and it did exactly what I needed it to do. I love how it has more than the standard 3 flips and I love how it locks itself into place. If I had one suggestion it would be to have some sort of funnel type end for the drain pipes to go into the drain holes in the bed of the truck. Without that, the water still drains into the bed. Although it is a minimal amount, the goal is to keep water out of the bed. I will have to figure out something to make this work the way I want, but otherwise, loving this bed cover so far. ... show more
Reviewed in the United States on August 5, 2024 by JT
    • pooor quality control and no security
Style: Revolver X4s Size: 6' 10" Bed
the pros: of this cover is the install is pretty straight forward. it is nice and sleek. shipping was fast the cons: it leaks a fair amount even when just parked, one of the plastic covers by the tail gate was broken, the black finish on he underside was all scrapped up. you could tell until it was install and you rolled it up. trying to box it up and send back would have been a serious PITA. Considering the price premium 800-900 more than soft cover, it reaally doesn't offer any more security. it is so flexy you can pull it open enough to release the side latches. One year update. Lowering to 1 star. The cover is almost useless in the winter. The release mechanism is almost always frozen and won’t release to allow rolling the top up ... show more
Reviewed in the United States on September 26, 2024 by keith ferguson
    • excellent quality
Style: BAKFlip MX4 Size: 6' 10" Bed
This bed cover was easily installed and excellent quality and fit.
Reviewed in the United States on September 30, 2025 by BEN
    • Good cover poor quality control.
Style: BAKFlip MX4 Size: 8' 2" Bed
The cover itself is great. This will be my third one in various trucks. The fit of this last one that I bought was horrible. I had to shave down all of the latches to get it to shut properly. Also, one of the rails had extra seal material. I had to take the end off and cut it and then reassemble. Shame on backflip for the quality control. ... show more
Reviewed in the United States on January 11, 2026 by James

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