BAKFlip MX4 & MX4TS Hard Folding Truck Bed Covers

BAKFlip MX4 – Description & Key Features

• The MX4 is BAK’s original premium hard-folding tonneau cover, made of heavy-duty aluminum panels with a high-density polymer core, finished in a matte-black, scratch- and UV‑resistant coating.

• Features include:

  • Tri‑fold design for full bed access

  • Integrated tailgate seal (can close tailgate with cover up or down)

  • Shock‑absorbent bumpers, prop‑rod clips, upgraded latch housing components

  • Flush-mount clamp-on install (typically under 1 hr) 

• Ideal for owners seeking a low‑profile, strong, weather‑resistant cover with good security and easy installation.

BAKFlip MX4 TS – Description & Key Features

• The MX4 TS builds on the MX4 design, adding built‑in T‑slot side rails to support racks, crossbars, cargo carriers, tents, and more 

• Key upgrades and features:

  • High-density polymer‑reinforced aluminum panels that are 22% stronger than the MX4 

  • Proprietary Multi‑Shield™ coating offering 11× greater surface durability

  • Patented auto‑latch locking system for enhanced security (an upgrade over MX4 Gen 2) 

  • Upgraded rubber perimeter seals, tight-fit clamps, dual-action tailgate seal and built-in water drainage for excellent water protection 

  • Supports up to 400 lbs evenly distributed on top 

  • Folds forward and props upright with dedicated bumpers, offering 100% bed access without blocking third brake light 

  • Click-in clamp installation reduces install time by ~12% versus MX4

  • Backed by a 5‑year warranty, assembled in the USA

Ideal Use Cases

• MX4: Best for truck owners wanting:

  • A rugged, lockable hard cover

  • Easy installation

  • Budget‑friendly yet durable protection

  • Basic weather and theft resistance

• MX4 TS: Adds appeal for users who:

  • Want to mount roof‑rack accessories directly to their tonneau

  • Need higher load capacity and improved security

  • Require superior weather sealing

  • Prefer a sleek, flush-mounted low profile with rack compatibility

Side-by-Side Comparison