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 conditions—from -40 to 180℉ and zero to 95% humidity—and guaranteed by a 5-year warranty.

BUILT 22% STRONGER
THAN THE ORIGINAL

Constructed for increased durability and heavy-duty use with a sturdy premium-grade aluminum surface and high-density polymer core.

EASIER THAN EVER
ONE-PERSON INSTALL

DIY installation is now 12% faster than the original with all-new click-in design. No need for an extra hand to help, and no drilling for most makes and models. Install yourself in under 30 minutes.

NO WASTED 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.

Product Highlights

High-density polymer-reinforced aluminum top panels are 22 percent stronger than the original MX4
Precision-engineered aluminum side rails and frame
Striking textured black finish across all components
Folds against the cab for 100 percent bed access
Re-engineered prop rod clips for a secure hold
Premium rubber bumpers protect the cab when folded into the upright position
Re-engineered automatic latching panels offer improved security over the GEN 2 design
Comprehensive 3rd brake light visibility in all positions

Simple one-person installation
12 percent quicker installation with all-new click-in design
Re-engineered perimeter seals and tight-fit clamps for superior weather protection
Extra-long, dual-action tailgate seal available on most applications
Integrated water drainage system
400 lbs. weight capacity (evenly distributed)
5-year warranty
Assembled in Missouri

THE BEST-SELLING TRUCK BED COVER
JUST GOT BETTER

BAK® is a RealTruck® Brand
We proudly manufacture and assemble each BAKFlip MX4 at our state-of-the-art facility in Missouri using globally sourced materials. We stand behind the quality of our engineering with a 5-year warranty against manufacturing and material defects.

CLICK for Full Product Details

The best-selling truck bed cover in the world just got better.

Introducing the new and improved RealTruck BAKFlip® MX4 (GEN 3)—an evolution of RealTruck’s most popular tonneau cover. This next-generation upgrade builds on everything truck owners already love about MX4, now enhanced with improved functionality, greater durability, and elevated security.

The new and improved BAKFlip MX4 is constructed primarily from alloy materials, including heavy-duty aluminum top panels and side rails. Reinforced with high-density polymer cores, each panel delivers a 22 percent increase in overall strength compared to the original model.

Security is also enhanced. In addition to BAK’s patented auto-latching system, which automatically secures the cover when closed, the BAKFlip MX4 (GEN 3) features re-engineered lock components for improved resistance to forced entry compared to the GEN 2. No matter the cargo you’re transporting, you can rest assured knowing your gear’s protected.

When the weather turns, the BAKFlip MX4 (GEN 3) holds strong. Revised EPDM rubber perimeter seals and tight-fit clamps provide our best seal yet, preventing seepage between the bed cover and bed rails. At the rear of the cover, a 13 percent longer dual-action tailgate seal provides weather protection for the tailgate. This innovative design also improves operation, maintaining factory tailgate functionality regardless of the cover’s position.

The BAKFlip MX4 isn’t only durable, it’s also sleek and stylish. Unlike competitors, the BAKFlip MX4 sits flush with your pickup’s bed rails, practically disappearing into your truck’s profile. And with a sleek, textured matte black finish across all surfaces, the MX4 looks great whether open or closed.

Installation is streamlined thanks to an improved click-in mounting system, reducing setup time by 12 percent. Operating the cover is just as simple—drop the tailgate, release the rear latch mechanism, and fold the cover toward the bulkhead. If full bed access is required, fold the cover flush against the rear window—third brake light visibility remains unobstructed in any position.

Installation

WHAT’S IN THE BOX

Tonneau Cover
Hardware Kit
Clamps
Rails
Install Guide

INSTALLATION TIME 30 mins or less

INSTALLATION DIFFICULTY Level 1: Simple installation

INSTALLATION OVERVIEW The BAKFlip MX4 Truck Bed Cover, with its all-new click-in design, offers a simple bolt-on installation using the included tight-fit clamps—no cutting, trimming, or drilling is required. Each order contains all necessary hardware and clamps for a hassle-free installation.

For installation tips and tricks, contact the experts, and check out our comprehensive install guides.

How to Install RealTruck BakFlip MX4 (Gen3) Hard Folding Tonneau Cover on a 2024 GMC Sierra