BAKFlip MX4 TS — Hard Folding Tonneau Cover with Built-In TrackSystem
Our BAKFlip MX4 TS delivers the proven durability of our MX4 hard folding tonneau with factory-integrated TrackSystem rails for ultimate versatility. Four reinforced aluminum panels fold flush against your cab or open fully for unrestricted bed access, while the built-in 250 lb capacity TrackSystem channels run the full length of the rails to secure tie-downs, cargo management accessories, and rack systems.
We engineered the MX4 TS for truck owners who demand both protection and functionality. The matte black aluminum panels resist dents and UV damage, install with our no-drill clamp system in under an hour, and maintain full bed access at every fold position. Dual automatic latches lock at the tailgate for security, and the low-profile design preserves your truck's sight lines while adding less than three inches of height.
Whether you're hauling gear with mounted tie-downs or keeping your bed organized with TrackSystem accessories, the MX4 TS combines BAKFlip's legendary panel strength with the flexibility of integrated cargo channels. Compatible with most full-size pickups, it's designed and assembled in the USA with our industry-leading warranty.
MX4 TS specs & construction
TrackSystem Integration & Cargo Capacity
The MX4 TS features our factory-installed TrackSystem rails that run along both sides of the cover, transforming your tonneau into a modular cargo platform. These T-slot channels accept any BAKFlip TrackSystem accessory — from tie-down anchors and cargo dividers to rack crossbars and bike mounts — giving you hundreds of configuration options without drilling into your bed.
Each rail supports up to 250 lbs of distributed weight when accessories are properly installed, so you can mount kayak racks, tool organizers, or ladder carriers directly to the cover. The channels sit flush with the panel surface, maintaining the MX4’s sleek profile while keeping tie-down points accessible from either side of the truck. Because the TrackSystem is integrated during manufacturing, the rails are sealed and reinforced to handle daily use without compromising the cover’s weather resistance.
Aluminum Panel Construction & Weather Protection
We build every MX4 TS panel from lightweight aircraft-grade aluminum with a powder-coated matte black finish that resists scratches, dents, and fading. The rigid panels support up to 400 lbs of evenly distributed weight when closed, so you can drive through snow country or set gear on top without worrying about panel flex.
Our exclusive hinge design uses industrial-grade components with sealed bearings that operate smoothly in sub-zero temperatures and desert heat. Each panel edge features dual EPDM weather seals that channel water away from the bed, and the automatic latches at the tailgate create a compression seal that keeps moisture, dust, and road spray out of your cargo area. The MX4 TS meets the same weather standards as our flagship models — we test every design against pressure washers, monsoon rain, and highway speeds to ensure your gear stays dry.
Installation & Truck Compatibility
No-Drill Clamp System
The MX4 TS installs using our patented rail clamp system that secures to your truck bed without drilling, welding, or permanent modifications. Position the side rails on your bed walls, tighten the clamps with the included hex key, and attach the panels using our pivot hinge brackets. Most installations take 45-60 minutes with basic hand tools, and our step-by-step instructions include photos for every truck model.
We manufacture model-specific rails for Ford F-150, F-250, and F-350; Chevy Silverado and GMC Sierra 1500-3500; RAM 1500-3500; Toyota Tundra and Tacoma; Nissan Titan and Frontier; and Jeep Gladiator. Each kit includes custom-fit rails that follow your bed’s contour and accommodate factory stake pockets, tie-downs, and bedliner edges. The clamps work with spray-in bedliners like LINE-X and Rhino Linings as well as most drop-in styles.
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BAKFlip MX4 TS Questions — Installation, Capacity & Compatibility
The integrated TrackSystem rails support up to 250 lbs of total distributed weight when accessories are properly installed according to our guidelines. This capacity applies to the combined load across both rails — so if you're mounting a BAKBox, tie-downs, and a bike rack, the total weight of all accessories plus cargo should not exceed 250 lbs. The cover panels themselves support up to 400 lbs of evenly distributed static weight when closed, which is separate from the TrackSystem capacity.
Yes, the MX4 TS is fully compatible with spray-in bedliners like LINE-X, Rhino Linings, and other brands. Our clamp system is designed to grip over most spray-in liner thicknesses without modifications. The kit includes adjustable clamps that accommodate the extra material thickness, and the rubber seal strips compress to create a weathertight fit against the textured liner surface. We also support installation over most drop-in bedliners as long as the liner does not cover the top of the bed rail where our clamps attach.
We manufacture model-specific MX4 TS kits for each truck make, model, and bed length combination. To find your fit, use our online fit guide and enter your truck's year, make, model, and bed length (short bed, standard bed, or long bed). Our system will show you the correct part number and confirm compatibility with your specific truck configuration. If you have aftermarket modifications like bed caps, rail covers, or utility track systems, contact our support team to verify fitment before ordering.
The MX4 TS replaces traditional bed rail mounting points, so accessories that clamp directly to your bed rails will need to be removed or relocated. However, the integrated TrackSystem channels are designed to accept a wide range of BAKFlip accessories including toolboxes, tie-downs, bike mounts, cargo organizers, and rack systems. If you have existing gear, check our TrackSystem accessory catalog to find compatible alternatives. Many customers transition from rail-mounted accessories to TrackSystem versions for the added flexibility of repositioning mounts anywhere along the cover.
Yes, the entire MX4 TS cover can be removed from your truck in under 30 seconds using our quick-release strap system. Simply pull the release straps near the cab, lift the folded cover off the side rails, and store it upright against a wall or in your garage. The side rails remain clamped to your bed, so reinstalling the cover is just as quick — line up the hinges and click the panels back into place. This makes the MX4 TS ideal for occasional hauling of tall cargo like furniture or appliances while maintaining daily bed protection the rest of the time.
Your MX4 TS ships with everything needed for installation: pre-assembled four-panel cover, TrackSystem side rails with integrated T-slot channels, all clamp hardware and fasteners, two key lock cylinders with keys, rubber drain tubes for water management, foam seal strips, and detailed step-by-step instructions with truck-specific diagrams. We also provide access to our online video library and customer support team if you need installation assistance. No additional tools beyond a hex key set and basic hand tools are required.
The MX4 TS uses the same four-panel aluminum construction, no-drill installation, and weatherproof design as our flagship MX4, but adds integrated TrackSystem rails for cargo management versatility. If you plan to use BAKBox toolboxes, tie-downs, or rack accessories, the MX4 TS gives you factory-installed mounting channels with 250 lb capacity. If you prefer a simpler setup without accessory mounting or want to save on cost, the standard MX4 offers the same panel durability and bed protection without the TrackSystem rails. Both models support the same static weight on the panels and offer identical installation methods.