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๐ Lock it, load it, flaunt it โ the MX4 means business.
The BAKFlip MX4 Hard Folding Truck Bed Tonneau Cover fits 2020-2025 Chevy/GMC Silverado/Sierra 2500/3500 6'10" beds, featuring durable matte-finished aluminum panels with automatic tailgate locking. It offers 100% bed access without blocking the 3rd brake light, supports up to 400 lbs, and includes dual drain tubes and full perimeter seals for weather protection. Proudly made in the USA with a 5-year warranty, it combines rugged security with sleek style for the modern truck owner.







| Asin | B07XC3D1BP |
| Automotive Fit Type | Vehicle Specific Fit |
| Brand Name | RealTruck |
| Customer Reviews | 4.4 4.4 out of 5 stars (431) 4.4 out of 5 stars |
| Exterior Finish | Aluminium |
| Global Trade Identification Number | 00192631030355 |
| Included Components | tonneau cover, rails, hardware kit, install guide |
| Item Type Name | truck bed tonneau cover |
| Item Weight | 32.21 kg |
| Lock Type | Tailgate |
| Manufacturer | BAK |
| Manufacturer Part Number | 448133 |
| Material Type | Aluminium |
| Model Number | 448133 |
| Oem Equivalent Part Number | 448133 |
| Style Name | Folding |
| Unit Count | 1.0 count |
| Upc | 192631030355 |
User
Top quality in every way!
This is my third BakFlip cover in the last ten years and the quality of fit and finish has improved dramatically despite the previous ones having no issues. I really like that all the hardware is now black rather than silver/raw aluminum.
User
Fits great and clears accessories.
Great fit, easy to install, and easily clears the grab bar handle in a 2023 GMC 2500HD and an AMP Research bed extender. I called to order it and they wouldnt sell it to me because of the bed extender, insisted it was to high. Called back next day and didnt mention the extender. Sent with no problem and fits great and easily clears the bed extender. I'm very happy with it.
User
Great product
BAKFlip 4 arrived in scheduled delivery time. It was packaged well. Instructions were good. Took 55 minutes from the time I started opening the box, read the instructions, and completed installation
User
Great Product
I am really happy with this cover. I installed a few weeks ago just before a trip. It has seen snow, rain and ice and worked great. Others mention some leakage but so far I have not had that. Took me an hour or two to install. Watch a video first. I also like the security of the cover and the way it folds. You can open partially or all the way. I agree the clips that hold the rods you use to keep the cover fully open are plastic and could break. Also, the weather strip that goes on the bed near the cab does not stick real well. I think these are minor issues and I would buy again. I used this cover on a new 2022 GMC 2500 AT4 with a standard bed and multi-pro tailgate. Fits perfect and no drilling required.
User
Quality Cover
Great bed cover!
Trustpilot
1 day ago
2 weeks ago