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BAKFlip MX4 (GEN 3) Hard Folding Tonneau Cover Fits 2019-2026 Chevy Silverado/GMC Sierra 1500, 8' Bed (BAK-448132)
THE ORIGINAL. OFTEN IMITATED.
NEVER DUPLICATED
MX4 defined the hard folding category—and still sets the benchmark with patented features, premium materials, and a proven design built to perform.
BEST-IN-CLASS AUTOMATIC SECURITY
COMES STANDARD
The patented auto-latch system engages immediately on closure—no separate locking action required—so your gear is locked down the moment it closes.
SEALED EDGE-TO-EDGE
TO KEEP WEATHER OUT
Advanced seals and precision-fit clamps create a tight, edge-to-edge barrier to block out the elements and keep your cargo dry.
BUILT STRONGER. BUILT BETTER.
BUILT TO LAST
Premium-grade, multi-layer aluminum construction over a high-density core delivers a stronger, more durable surface that’s tested for years of reliable performance. Don't settle for single-layer construction that bends under pressure.
FULL BED ACCESS
WITH NO COMPROMISE
Simply fold to the cab, secure, and safely drive with the cover fully open - no removal needed for large cargo. Plus, the industry’s only hard-fold that doesn't block your 3rd brake light.
EASY ONE-PERSON INSTALL.
UNDER 30 MINUTES
The simple click-in design lets you install it yourself in under 30 minutes—no extra hands required, and no drilling required for most trucks.
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-lb. weight capacity (evenly distributed)
Assembled in the USA (Missouri)
Simple bolt-on, click-in installation in under 30 minutes
5-year warranty supported by dedicated product experts and customer service team based in the USA
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Installation
INSTALLATION TIME 30 mins or less
INSTALLATION DIFFICULTY Level 1: Simple installation
INSTALLATION OVERVIEW The BAKFlip MX4 (GEN 3) 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 in under 30 minutes.
For installation tips and tricks, contact the experts, and check out our comprehensive install guides.
Get It Installed
Warranty
WARRANTY COVERAGE This truck bed cover comes with a hassle-free warranty against defects in materials or workmanship as follows and is supported by dedicated product experts and customer service team based in the USA. This warranty is void if the product has been damaged in an accident, or due to neglect, unforeseeable use, improper installation, improper servicing, or other cause not arising out of defects in material or workmanship.
MX4 & F1 - The truck bed cover carries a limited hassle-free warranty for five (5) years from the original date of purchase, subject to the terms below.
G2 & FiberMax - The truck bed cover carries a limited hassle-free warranty for three (3) years from the original date of purchase, subject to the terms below.
WARRANTY IS NOT TRANSFERABLE The warranty is to the initial owner purchasing the truck bed cover and it is not transferrable to a subsequent end user. Proof of purchase may be required to enforce these warranty rights.
WARRANTY CONDITIONS Failure to follow care and use instructions will void the warranty.
- Clean with mild automotive soap and water only.
- Cover must be secured at all points when vehicle is in motion.
- Check all clamps and retention mechanisms for tightness after a week of driving following installation (or re-installation) of the cover and periodically thereafter.
- Before opening, the cover must be free of all foreign materials including snow and ice.
- Do NOT tow your vehicle from the rear with the cover on your vehicle. If towing from the rear is required, the cover MUST be removed from the vehicle and properly stored.
WARRANTY PERFORMANCE If all warranty conditions are met, a defective truck bed cover or hardware component will either be repaired or replaced (at our option). We reserve the right, for any warranty, to substitute a newer model or bed cover having similar form and function, to offer a warranty discount on an entire replacement system, and/or provide remedies other than those mentioned in this document.
WARRANTY RETURN A Return Material Authorization number must be obtained from our Customer Service Department prior to returning any product. We may require the original item to be returned postage prepaid for final determination. Shipping charges will apply for any repair or replacement. Other than postage or shipping charges, no charge will be made for repair or replacement under this warranty.
This warranty gives you specific legal rights. As an owner, you may also have additional rights and remedies under the laws of your state.
WARRANTY REGISTRATION Warranty registration must be on file and/or proof of original purchase (detailed and dated receipt) required for warranty to be effective.