BAK Industries 448311 BAKFlip MX4 Hard Folding Tonneau Cover Matte Aluminum

The BAK Industries BAKFlip MX4 (Part #448311) is a premium hard tri-fold tonneau cover engineered for heavy-duty trucks. Built from heavy-duty aluminum top panels and side rails reinforced with high-density polymer cores, the MX4 delivers a 22% increase in overall strength over its predecessor — providing robust, all-season cargo protection without sacrificing a sleek, flush-mount profile.

Key Features:

• Durable Aluminum Construction: Matte-finish aluminum panels resist UV damage, scratches, and marks for long-lasting good looks
• High-Density Polymer Core: Each panel is reinforced for superior rigidity and load-bearing capacity — rated for over 400 lbs. of evenly distributed weight
• Auto-Latching Security System: BAK's patented auto-latch automatically secures the cover when closed; re-engineered lock components provide enhanced resistance to forced entry
• EPDM Rubber Perimeter Seals: Revised seals and tight-fit clamps provide a best-in-class weather barrier, preventing seepage between the bed cover and bed rails
• Dual-Action Tailgate Seal: A 13% longer tailgate seal delivers weather protection at the rear and allows the tailgate to be operated open or closed regardless of cover position
• 100% Bed Access: Folds forward panel by panel and flips up fully against the cab without obstructing the third brake light
• Easy Installation: Click-in rail system with clamp-on mounting — no drilling required except for optional drain tubes — reduces install time by up to 12%
• 5-Year Warranty: Backed by a limited 5-year warranty against manufacturing and material defects
• Flush-Mount, Low-Profile Design: Textured matte-black finish across all surfaces delivers a clean, integrated appearance

The BAKFlip MX4 hard folding truck bed cover is the go-to upgrade from the G2 aluminum series, combining everyday durability with enhanced weatherproofing and security. Assembled in Missouri, it is an ideal choice for truck owners seeking a professional-grade, all-season tonneau cover.