To see if this custom-fit item will work for you please tell us what vehicle you'll use it with.
Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.
Error submitting comment. Please try again momentarily.
When you need to haul large gear or a full load, the BAKFlip MX4 folds all the way up against the cab so you can use the entire bed. The prop rods hold the panels securely in place while you drive, and you can also fold it partway to handle smaller loads. Because it mounts inside the bed rails, you keep access to stake-pocket-mounted accessories or raised side rails without losing space.
Truck beds take a beating, but this cover is built for it. Each panel is ½ inch thick and made from rustproof aluminum with a premium-density foam core for strength. The top surface is matte black to resist scratches, scuffs, and UV rays, and it’s rated to support up to 400 lbs of evenly distributed weight. That means you can load gear on top or roll through tough weather without worrying about damage.
Rain and car washes don’t have to ruin what’s in your bed. The MX4 uses matte black rubber seals and a built-in drainage system to channel water out. A rear seal lets you open and close the tailgate whether the cover is up or down, so you don’t have to wrestle with it when the weather turns. With the tailgate locked, the automatically latching panels create a secure, sealed bed space.
Some covers sit high and look bulky, but this one fits flush inside your bed rails for a low-profile look. The aircraft-grade aluminum rails with a black powder-coat finish match the panels and tie everything together. Matte-finished cab corner caps, clamps, and elevator bolts keep the edges smooth and refined, while pre-molded shock-absorbent bumpers and prop-rod clips make daily use simple and solid.
You don’t need to break out the drill to install the MX4. The frame rails clamp directly to the inside of the bed, and included bolts secure the front hinge rail to the frame rails. Once tightened down, the cover sits square and solid. It’s ready to go without permanent modifications, so you can get back to hauling and protecting your cargo right away.
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.
Do you have a question about this Tonneau Cover?
Info for this part was:
At etrailer we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.
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!