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When you need the whole bed for hauling, the BAKFlip MX4 makes it easy. The quad-fold design lets you flip the panels open one by one for partial or full access without removing the cover. Prop rods hold the folded cover upright, so you can drive with the bed completely open. Even when it’s fully folded, it only extends about 8 inches from the bulkhead, giving you maximum usable space.
Rain, sun, or snow—this cover is built to handle it. Each ½-inch-thick aluminum panel is rustproof and reinforced with a premium-density foam core for extra strength. The matte black finish resists scratches, scuffs, and UV rays, keeping it looking sharp year after year. Seals along the rails and a built-in drainage system help keep water out of the bed so your cargo stays dry.
Once you close the tailgate, the MX4 automatically locks down to keep everything in the bed secure. The panels latch into place without the need for extra handles or keys. And because the rear seal allows the tailgate to open or close even when the cover is down, you get solid protection and easy access at the same time.
This cover sits flush inside the bed rails for a sleek, low-profile look that doesn’t stick out past the sides. The aircraft-grade aluminum frame rails clamp on—no drilling required—and the included bolts secure the front hinge rail in place. Since it mounts inside the rails, you can still use stake-pocket-mounted accessories or raised side rails without interference.
You can load gear or supplies on top without worry. The BAKFlip MX4 is rated to support up to 400 lbs of evenly distributed weight, thanks to its rigid aluminum panels and sturdy frame. That makes it a solid choice for work, travel, or everyday hauling when you need both protection and strength in one cover.
Ratings & Reviews
Rob
6/4/2025
The BAKFlip after 2 years is still functioning great. I fixed the curling cushion by applying some strong adhesive to the spots that had detached, taped it in place and let cure for a couple of days. That solved that issue. Would continue to recommend the BAKFlip to others.
Jenny N.
4/4/2022
You mentioned that the glue holding the pads are failing. I wanted to see if you would be able to send a picture to show the locations.
Sherry H.
5/19/2020
Its still amazing. Works just like its suppose to glad I made the purchase.
Jason
12/11/2023
The cover is still excellent and keeps our items dry and secure on those road trips. I stand by my initial review and still wish the weatherstripping would stick the the spray in liner better but its only been a minor annoyance that hasnt resulted in any water getting into the bed.
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Claire H.
7/14/2026
Thanks for the great feedback! We're glad you're enjoying the tonneau cover and that being able to use almost the entire truck bed when it's open has been such a big plus. It's also nice knowing your gear stays secure when you lock the tailgate. We appreciate you mentioning the clamps too—that kind of feedback is always helpful. Thanks again, and we hope you keep enjoying your new cover!