Upgrade your truck bed security and weather protection with the BAKFlip MX4 (Gen 3) hard folding tonneau cover. Built with reinforced aluminum panels and a high-density polymer core, this latest-generation MX4 is stronger, more secure, and easier to install than previous versions. It delivers a flush, low-profile look while maintaining full bed access and theft-resistant protection.
This Gen 3 design features upgraded auto-latching panels, improved perimeter seals, tighter-fit clamps, and a faster click-in installation system — making it one of the most refined hard folding covers available for the Toyota Tundra.
Important note
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Vehicle fitment: Toyota Tundra 2022+
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Bed length: 5'7" / 66.7" bed only
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Part numbers: 448440, 448441
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Trail Special Edition: Will not work with Trail Special Edition storage boxes
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Tie-down cleats: Must be removed if equipped and cannot be reinstalled
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Install type: No-drill clamp-on installation for most applications
Features
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Gen 3 upgrade: More secure and more durable than Gen 2 design
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22% stronger panels: Aluminum top panels with high-density polymer core
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Auto-latch security: Patented automatic latching system with improved lock components
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Weather protection: Upgraded EPDM seals and tight-fit clamps help keep water out
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Flush profile: Sits level with bed rails for a clean OEM-style appearance
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Tri-fold access: Fold toward the cab for partial or full bed access
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Full bed use: Drive safely with cover folded fully upright and secured
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Extreme-condition tested: Validated from -40°F to 180°F and high humidity
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Matte black finish: Textured, scratch-resistant surface
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Cab protection: Premium rubber bumpers protect cab when folded upright
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Brake light visibility: Third brake light remains visible in all positions
Construction and performance
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Panel material: Heavy-duty aluminum with polymer core
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Frame and rails: Precision-engineered aluminum
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Finish: Textured matte black
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Weight capacity: 400 lbs evenly distributed
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Drainage: Integrated water management and drainage system
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Seals: Re-engineered perimeter and extended tailgate seals
Installation
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Install time: 30 minutes or less
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Difficulty level: Level 1 – simple installation
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Design: New click-in rail system — about 12% faster than previous version
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Tools: Basic hand tools only
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Drilling: Not required for most applications
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One-person install: Designed for solo installation
What’s in the box
- Hard folding tonneau cover
- Side rails
- Clamp set
- Hardware kit
- Installation guide
Warranty
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Coverage: 5-year limited warranty
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Eligibility: Original purchaser only with proof of purchase
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Scope: Covers structural defects in materials and workmanship
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Exclusions: Damage from misuse, improper install, modification, or normal wear
