Fold Down Security and Weather Protection for Your Super Duty Long Bed
Heavy duty work trucks need a bed cover that can take a beating without giving up security. The BAK 449331TS BAKFlip MX4 TS uses a hard folding aluminum panel design that locks flush to the bed rails, sealing out weather while keeping the factory tailgate step and camera functions fully usable. When you need full bed access, the panels fold forward in seconds and stay out of the way.
BAK Industries has built hard folding tonneau covers for over two decades, and the BAKFlip MX4 TS carries that same matte finished aluminum panel construction with upgraded perimeter seals for a tighter weather seal than the standard MX4.
Key Features
- Hard folding aluminum panels automatically latch when closed or partially folded
- Matte finish resists scratches, marks, and UV fading
- Low profile design sits flush with the cab and bed rails
- Dual action tailgate seal maintains weather protection whether the tailgate is open or closed
- Panels fold completely out of the way for full bed access when needed
- Compatible with factory tailgate step and backup camera
- Locks automatically with the tailgate closed for theft deterrence
This Part Fits
| Year Range |
Make |
Model |
| 2017-2026 |
Ford |
F-250 Super Duty |
| 2017-2026 |
Ford |
F-350 Super Duty |
Fits 8.2 foot (98.1 inch) long bed configurations only. Confirm bed length before ordering.
Specifications
| Detail |
Value |
| Brand |
BAK Industries |
| MPN |
449331TS |
| UPC |
819275042390 |
| Series |
BAKFlip MX4 TS |
| Cover Material |
Aluminum Panels |
| Finish |
Matte Black |
| Bed Length |
8.2 ft (98.1 in) |
| Lock Type |
Tailgate Integrated |
| Country of Origin |
United States |
What's Included
- BAKFlip MX4 TS Folding Panel Set
- Mounting Rails and Clamps
- Perimeter Seal Kit
- Installation Hardware
About BAK Industries
BAK Industries designs and manufactures hard folding, retractable, and roll up truck bed covers in the United States, with the BAKFlip lineup built around durable aluminum panel construction and tailgate integrated locking systems.
Frequently Asked Questions
What is the 449331TS?
The 449331TS is a BAK Industries BAKFlip MX4 TS hard folding tonneau cover built for the 2017-2026 Ford F-250 and F-350 Super Duty with an 8.2 foot long bed.
Does the MX4 TS block the backup camera or tailgate step?
No, the cover is designed to remain fully compatible with the factory tailgate step and backup camera.
Can I still use my dual action tailgate with this cover installed?
Yes, the dual action tailgate seal keeps the bed sealed whether the tailgate is used in the drop down or swing open position.
Does the BAKFlip MX4 TS require drilling to install?
No, the cover mounts using clamps to the factory bed rails without drilling.
How does the panel folding work?
The aluminum panels fold forward toward the cab in sections, latching automatically at each fold point and locking when the tailgate is closed.
Is the BAKFlip MX4 TS compatible with a spray in bed liner?
Yes, the clamp on mounting system works with most spray in and drop in bed liners.
What is the difference between the MX4 and MX4 TS?
The MX4 TS uses upgraded perimeter seals compared to the standard MX4, providing a tighter weather seal around the panel edges.
Can this cover support a load on top when closed?
The panels are rated for distributed static loads when fully closed and latched, but heavy point loads should be avoided.
Install Instructions
- Lay out the mounting rails along the bed rail channels per the included template.
- Secure the rails using the provided clamps without drilling into the bed.
- Attach the folding panel sections to the rail system starting at the cab end.
- Adjust the perimeter seals for a consistent, even contact along the bed rails.
- Test the folding action and confirm each panel latches securely.
- Close the tailgate and confirm the integrated lock engages properly.
