BAK BAKFlip MX4 (GEN 3) Hard Folding Tonneau Cover - 448133
Pickup available at DEO In House Inventory
Usually ready in 24 hours
Fits 2020-2026 Chevy Silverado 2500/3500, GMC Sierra 2500/3500, 6'9" Bed (BAK-448133)
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
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High-density polymer-reinforced aluminum top panels are 22-percent stronger than the original MX4
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Precision-engineered aluminum side rails and frame
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Striking textured black finish across all components
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Folds against the cab for 100-percent bed access
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Re-engineered prop rod clips for a secure hold
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Premium rubber bumpers protect the cab when folded into the upright position
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Re-engineered automatic latching panels offer improved security over the Gen 2 design
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Comprehensive 3rd brake light visibility in all positions
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Simple one-person installation
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12-percent quicker installation with all-new click-in design
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Re-engineered perimeter seals and tight-fit clamps for superior weather protection
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Extra-long, dual-action tailgate seal available on most applications
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Integrated water drainage system
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400-lb. weight capacity (evenly distributed)
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Assembled in the USA (Missouri)
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Simple bolt-on, click-in installation in under 30 minutes
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5-year warranty supported by dedicated product experts and customer service team based in the USA
