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RealTruck

RealTruck BAK BAKFlip MX4 Hard Folding Truck Bed Tonneau Cover | 448134 | Fits 2020-2025 Chevy/GMC Silverado/Sierra 2500/3500HD 8' 2" Bed (98.2")

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Availability: Only 1 left in stock, order soon!
Fulfilled by Sparkfish
Arrives Nov 10 – Nov 15
Order within 15 hours and 52 minutes
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Style: BAKFlip MX4


Size: 8' 2" Bed


Features

  • Fits 2020 - 2024 Chevy/GMC Silverado/Sierra 2500/3500HD 8' 2" Bed (98.2")
  • Made in the USA with Global Materials
  • ULTIMATE SECURITY | The BAKFlip MX4 tonneau cover has durable aluminum panels that automatically latch as the cover is partially or fully closed, and is fully locked once your tailgate is closed
  • STYLISH MATTE FINISH | Featuring matte-finished aluminum panels, protecting against marks, scratches and UV damage; as well as premium upgrades to the perimeter seals and hardware
  • 100% BED ACCESS | Operate this cover closed, folded or flipped up, all without covering the 3rd brake light. Paired with a dual action tailgate seal for tailgate operation open or closed

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: ‎192631031130


Automotive Fit Type: ‎Vehicle Specific Fit


Global Trade Identification Number: ‎30


Model: ‎BAKFlip MX4


Item Weight: ‎0.16 ounces


Product Dimensions: ‎100 x 6 x 4 inches


Item model number: ‎448134


Manufacturer Part Number: ‎448134


Date First Available: January 28, 2020


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Nov 10 – Nov 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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  • 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.
    • Great truck bed cover
Style: BAKFlip MX4 Size: 6' 10" Bed
Great product just keeps getting better. I have bought several of them now over years and I will say the rail mounting system is even better So is the retention system for the first panel. Excellent Value. Quality Made.💯
Reviewed in the United States on August 10, 2025 by eric s.
    • Disappointing Bed Cover For The Money
Style: BAKFlip MX4 Size: 6' 10" Bed
Review Image by Thad Yeargain Thad Yeargain
Review Image by Thad Yeargain Thad Yeargain
Review Image by Thad Yeargain Thad Yeargain
Review Image by Thad Yeargain Thad Yeargain
The media could not be loaded. Would have loved this bed cover. The finish is awesome and it lays very flat unlike others I have had in the past. The install was fairly simple other than you don't get paper instructions anymore and have to watch a video on YouTube for install. For the money they really should finish installing the clips for tie-downs. And the crappy foam blocks they give you to lean the cover against the cab suck! Mine also came missing parts and will not fully secure and is easily broken into. This is my 8th bed cover I have purchased and installed and they have more than doubled in price and cut quality in half. BAK customer service is even worse!! Rude inconsiderate and insanely hard to get in touch with. Update - I can break into these tonneau covers in under 10 seconds with no tools and no noise. Extra $50 of parts and this is a 10 star cover. Don't keep any expensive tools underneath!!!!! ... show more
Reviewed in the United States on July 7, 2025 by Thad Yeargain Thad Yeargain
    • Great Product
Style: BAKFlip MX4 Size: 6' 10" Bed
I am really happy with this cover. I installed a few weeks ago just before a trip. It has seen snow, rain and ice and worked great. Others mention some leakage but so far I have not had that. Took me an hour or two to install. Watch a video first. I also like the security of the cover and the way it folds. You can open partially or all the way. I agree the clips that hold the rods you use to keep the cover fully open are plastic and could break. Also, the weather strip that goes on the bed near the cab does not stick real well. I think these are minor issues and I would buy again. I used this cover on a new 2022 GMC 2500 AT4 with a standard bed and multi-pro tailgate. Fits perfect and no drilling required. ... show more
Reviewed in the United States on March 8, 2022 by Dave K
    • Looks great and is very sturdy, but slam latches don’t work and it leaks.
Style: BAKFlip MX4 Size: 6' 10" Bed
I bought this for me 2024 GMC Sierra HD. The install is straightforward, but because of the design of my truck bed, I could it get the brackets for the rail as close to the tailgate as the instructions specified. Because of this, the rail has too much play at the end and the slam latches don’t work. When I close the last panel, I have to manually squeeze each side to engage the latch. Also, I don’t know if it’s related to the above, but it is not very water tight and a good amount of water leaks in from the sides. Overall I like it, though. I like that I can lift it up to allow full access to the bed (my previous tonneau covers didn’t allow that without removing the whole thing), and I like that it is solid and sturdy. ... show more
Reviewed in the United States on October 5, 2024 by D. E. Bedwell
    • 2nd one
Style: BAKFlip MX4 Size: 6' 10" Bed
Easy Install and the updated design is an improvement.
Reviewed in the United States on July 12, 2025 by Big D
    • Very Solid Product
Style: Revolver X4s Size: 6' 10" Bed
Installed the bed cover by myself, however I would recommend getting a helper if you can for a couple of steps in the installation. As far as the fit & function of it, I am completely happy with it. Waited for a couple of months of use before writing this review just to be sure. It seals up nice, easy to open/close, and seems very sturdy. Worth the price IMO. Highly recommend. ... show more
Reviewed in the United States on October 23, 2024 by ShaunNC

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