RealTruck BAK BAKFlip MX4 Hard Folding Truck Bed Tonneau Cover | 448135 | Fits 2019-2025 Chevy/GMC Silverado/Sierra (Works with Carbon Pro Bed) Works w/MultiPro/Flex Tailgate 5′ 10″ Bed (69.9″)

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RealTruck BAK BAKFlip MX4 Hard Folding Truck Bed Tonneau Cover | 448135 | Fits 2019-2025 Chevy/GMC Silverado/Sierra (Works with Carbon Pro Bed) Works w/MultiPro/Flex Tailgate 5′ 10″ Bed (69.9″)
Price: $1,349.99 - $1,099.99
(as of Sep 30, 2025 01:53:00 UTC – Details)

The BAKFlip MX4 was the first matte-finished, hard folding cover to market, becoming America’s #1 Selling Hard Folding Cover in just a few years. Simply put, the MX4 just looks better than other covers. Its sleek no-profile appearance allows you to maintain the appearance of your truck, while enabling you to securely stow cargo in the bed. The MX4’s pioneering, textured matte-finish adds a premium look and feel while also protecting against UV damage, annoying finger print marks, and scratches. MX4 has everything you expect from a premium cover. The engineers at BAK Industries fine-tuned even the smallest elements of the cover, down to adding cab corner caps and rail-end cap, to extending a matte-finish throughout the cover’s side rails, clamps, and elevator bolts. The MX4’s integrated buckle system and automatic latching mechanism allows you to drive with the cover partially or fully opened without covering the 3rd brake light. For 100% bed access, simply unlock the cover from either side via its pull latches and fold the cover all the way up against the cab. From there, you can prop the cover in place by tightening two rods into the underside of the panel. For enhanced durability, the MX4 also features pre-molded, shock-absorbent bumpers on either side of the panel, protecting the folded panels from hitting the cover during turbulent driving. Rain or shine, the MX4 provides confident cargo storage that’s complete with dual drain tubes to divert water away from the truck bed, as well as full perimeter seals to help protect against water intrusion. Finally, the MX4 can hold up to 400lbs of evenly distributed weight and is backed by a 5-year, hassle-free warranty. BAKFlip MX4 is proudly made in the USA with globally sourced materials with a US-based support team. .
Fits 2019 – 2024 Chevy/GMC Silverado/Sierra (Works with Carbon Pro Bed) works w/ MultiPro/Flex tailgate 5′ 10″ Bed (69.9″)
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

Customers say

Customers find the tonneau cover easy to install and well-built, with one noting its sturdy aluminum slats. The cover fits well, particularly on 2022 GMC Sierras, and provides good security by sealing the bed well. While customers describe it as reasonably water-tight, some report issues with water getting in at the rear. The durability receives mixed reviews, with several customers reporting that the cables broke after about 4 uses.

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