BAKFlip MX4 Hard Folding Truck Bed Tonneau Cover to suit Toyota Tundra 5' 7" Bed by Bak
BAKFlip MX4 Tonneau Cover
Sleek, secure, and durable. The BAKFlip MX4 is BAK’s premium hard-folding tonneau cover, offering unmatched protection, weather resistance, and a clean, flush-mounted design for your Toyota Tundra.
Constructed from heavy-duty aluminium panels and side rails, the MX4 is built to withstand everyday use while resisting cuts, slashes, and forced entry. BAK’s patented auto-latching side rails automatically lock each panel as you close it, keeping your cargo secure from would-be thieves.
Weather protection is just as impressive. The MX4 uses premium EPDM rubber perimeter seals and a dual-action tailgate seal to prevent leaks and keep your gear dry in all conditions. The dual-action design also means you can open or close the tailgate with the cover up or down, adding convenience to security.
For style, the MX4 delivers with its flush-mounted fit and matte black textured finish, blending seamlessly with your truck’s profile for a sleek, factory look.
Installation is simple with the included clamp system—no drilling required. Operation is just as easy: drop the tailgate, release the rear latch, and fold the cover forward. For full bed access, fold it flat against the cab and secure it with the integrated prop rods and upgraded clips.
Key Features
#1 Best-Selling RealTruck Cover
Tough & Durable
- Built from alloy materials with heavy-duty aluminum panels and side rails for maximum strength.
Sleek & Stylish
- Full textured matte-black finish that sits flush with your truck’s bed rails for a clean, factory look.
Weather Resistant
- Premium EPDM rubber seals block water between the cover and rails, while a dual-action tailgate seal keeps your tub weatherproof.
Easy to Use
- An improved latch system reduces cable fatigue, making operation smooth and effortless.
Features
- Heavy-duty aluminum panel and rail construction
- Matte-black finish adds a sleek, understated accent
- Refined latch system for smooth, long-lasting operation
- Folds forward for 100% full bed access
- Weather-resistant rubber seals and end caps for superior protection
- Extra-strong prop rods secure cover safely in the open position
- Premium rubber bumpers protect the cab from contact with the cover
- Integrated drain tubes keep your cargo dry
- Redesigned rail and clamp system for faster, no-drill installation
- Supports 400+ lbs. of evenly distributed weight
- Backed by a limited 5 year manufacturer warranty
What's in the Box
- Tonneau Cover
- Hardware Kit
- Clamps
- Rails
- Install Guide
Installation Overview
- The BAKFlip MX4 Tonneau Cover offers a simple bolt-on installation using the included clamps—no cutting, trimming, or drilling is required. Each order contains all necessary hardware and clamps for a hassle-free installation.
Frequently Asked Questions
Which Tundra does this cover fit?
This BAKFlip MX4 is designed for the Toyota Tundra with the 5'7" bed. The Tundra is also available in a 6'5" bed — if you have the longer configuration, you'll need a different fitment.
Does the MX4 require drilling to install on the Tundra?
No drilling is required. The MX4 uses a clamp-on rail system that attaches to the Tundra's bed rails. The installation guide covers everything, and no modifications to the bed are needed.
How much weight can the MX4 support?
The BAKFlip MX4 is designed to support up to 400 lbs (approx. 180 kg) of evenly distributed weight when the cover is closed. This is a distributed load rating — it's not intended for concentrated point loads or standing on the cover.
What's in the box?
The kit includes the tonneau cover, hardware kit, clamps, rails, and an installation guide.
How does the dual-action tailgate seal work?
The MX4's dual-action tailgate seal is designed to maintain a weatherproof barrier whether the tailgate is up or down. This means you can open or close the tailgate independently of the cover — handy for loading the tub without having to fold the cover forward first.
Does the BAKFlip MX4 allow full bed access?
Yes — the MX4 folds forward in panels toward the cab, giving you 100% bed access when fully open. You can also drive with the cover in the 2/3-open position if you need to carry longer items while keeping the front section of the tub covered and protected.
Will it fit a Tundra with a drop-in bed liner already installed?
The MX4 clamps onto the bed rail caps, so most factory and aftermarket bed liners are compatible. If you have a raised-lip drop-in liner with a thick profile, check that it doesn't conflict with the clamp position before ordering.
How does the BAKFlip MX4 compare to the BAK Revolver X4TS for the Tundra?
The MX4 is a hard folding cover that sits flush with your truck's bed rails and folds in sections toward the cab — it gives a clean, factory look. The X4TS is a hard rolling cover with T-slot side rails, which lets you mount load bars and cargo accessories on top of the cover. If you want to carry gear on the outside (kayaks, bikes, load bars), the X4TS is better suited. If you prefer a flush fold-flat profile without over-bed mounting, the MX4 is the cleaner option. Both come with no-drill installation and a 5-year warranty.
