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Some covers make it a hassle to haul large gear because they have to come off completely. The BAKFlip MX4 solves that with a quad-fold design. You can flip back as many panels as you need or fold them all up against the cab for full bed access. Prop rods hold the cover upright so you can drive with the bed open, and the integrated buckle system lets you secure it in the folded, flipped-up, or closed position without any loose straps or tools.
If you’re out in all weather, a durable cover is a must. The MX4 uses ½" thick, rustproof aluminum panels with a premium-density foam core that add strength without extra weight. It’s rated to hold up to 400 lbs of evenly distributed cargo, and the matte black finish resists scratches, scuffs, and UV rays so it stays looking sharp through years of use.
Rain and car washes can send water everywhere, but this cover is built to keep your gear dry. Matte-black rubber seals line the edges while a built-in drainage system channels water out of the bed. The rear seal lets you open or close the tailgate with the cover up or down, so you’re not fighting the weather just to load or unload.
For a sleek finish that doesn’t stick out past the bed rails, the MX4 mounts flush inside the bed. The aerodynamic profile reduces drag and helps maintain a smooth look while you drive. Because it sits inside the rails, you still have access to stake-pocket-mounted accessories or raised side rails—a clean setup that’s practical, sturdy, and sharp.
There’s no drilling required—frame rails clamp to the inside of the bed, and included bolts secure the front hinge rail. Once in place, the automatically latching panels lock when the tailgate is closed, creating a secure bed space for tools or gear. It’s simple, strong, and ready to go right out of the box.
Customer Satisfaction Score:
99% were satisfied with this product
1% of customers were not satisfied
Ratings & Reviews
Great tonneau cover. Fits as it should.
Purchased this BAKFlip for my new 22 RAM Classic 1500. Installation went well, instructions were good to follow, and it fit perfectly. One of the plastic hold down clips had a manufacturer defect with excess plastic mold residue inside the clip that prevented it from properly working. I sent an online warranty claim explaining the problem, and a new clip was sent to me in a reasonable amount of time, and it worked fine. After one year of using the cover, I am very happy with it. Everything functions as it should, and it is very versatile. While it is not 100% watertight, I mostly notice a small amount of leakage around the tailgate seal after washing the truck. Under normal rainy weather, there is no leakage, and we get plenty of rain in the PNW. My four-star rating rather than a 5 star is only because of the manufacturer defect and the curling of one of the rubber cushions on the underside of one of the panels where the adhesive holding it on the edges has not held up under the hot weather (with the black color, when the sun beats down on the cover it gets pretty toasty inside the truck bed with the cover closed). I am thinking that should be an easy fix by applying some good adhesive and taping in place until the adhesive cures. Just haven't gotten around to doing it. Again, really like this cover. Would recommend it to others, and if I ever have a need for one in the future, would definitely not hesitate getting another BAKflip.
Overall, I am very pleased with my BAKFlip MX4. It has held up well after 1 year. It works well and looks good. It matches my matte black accessories and trim. It was fairly easy to assemble but I did have some tight fitment issues near the cab where the cover connects to the rail. I really like the security of the hardtop and access through the tailgate. Water is generally kept out, but sometimes there are water drips near the tailgate depending on the angle parked. So this cover keeps the bed *mostly* dry.
etrailer was very fast to deliver my cover, and it came in good condition.
BAKFlip MX4 is a great addition to any pickup. It allows for secure transport of material, keeping it dry in bad weather and yet readily accessible with the flip of a panel. It also keeps the weather away from your 5th wheel hitch. Can be left on when towing.
The bed cover has been great so far. Followed the instructions and took my time adjusting it and it has been working well. Keeps the bed dry and looks good. I did have to order an extra kit to get enough rail clamps. Once I put the extra clamps on it feels much more secure. For 8ft beds they need atleast 8 to 10 clamps, not 6. The cover has been working in that I don’t have to uncover the whole bed to use it. I just need to open up as much as I need at the time.
I love how this tonneau cover works. because it allows use of almost the entire bed of the truck when it's fully open. I was a little disappointed with the clamps for installing the side rails, as they didn't seem as robust as the clamps in the cover I bought for my last truck. However, I am happy with its operation, and the fact that the truck bed is a locked compartment when I lock the tailgate.
Looks great and was easy to install
Excellent tonneau, easy install, quality product. Installed a year ago, no problems, still looks like new
Keeps out the water well. However if you do a lot of dirt roads like I do a lot of dust still gets in. No regrets buying it.
Great product, a little pricey but you get what you pay for. It keeps objects save and protected from the weather. Very well built and have had no issues.
I love the design of it and it is rock solid
I am very satisfied with my Tonneau cov er.
Both items have been rreceived .
After a year with my BAKFlip MX4 tonneau cover, I'm completely satisfied, in my opinion, that I purchased the best rigid and secure cover for my 2017 F350 Super Duty truck, with 6'-9" box.
Love that I can have a cover on my truck while towing a fifth wheel. It folds up nice and latches to stay out of the way of the fifth wheel hitch. Then I can keep items in the back of my truck while camping and they are secure (my tailgate locks).
It's a straight forward assembly but photos of the assembly steps would be better than the illustrations.
NOTE: This model allows you to open and close the tailgate without lifting up the cover. The other models require you to lift the cover so the tailgate won't damage it.
Solid performance. Only issue is with the glue holding the pads is failing
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.
the bedcover finally came in.
Few pictures of it installed.
I am a huge fan of the BAKFlip. The installation was pretty straight forward and easy. Anybody with moderate mechanical ability can install. I think it took less than 2 hours. I live in a heavy snow area and had more than 24” of snow on it at one point and the product performed flawlessly.
Bought it used.. I asked if it was complete undamaged.. It arrived complete including a scratch on the inside cover.. I'm glad it wasn't on the outside cover. Shipping was quick. Installation was fairly straight forward
So after a year I am still loving this bed cover. Had the fiberglass version for my 2013 F-150 and loved it as well, that's why I purchased this one for my 2019 Super Duty, it was also the first accessory I purchased for it because I was so used to my other one and knew I couldn't live without it. I never installed the drain tubes on either covers and still haven't had water get it my bed. Also the folks at etrailer are always awesome! Thanks again!
Ordered the BAKFlip MX4 for my son on 12/15 after calling to verify the tonneau would arrive by Christmas. Then received an email that said "Your order has been forwarded to one of our partners for direct shipment to you" and never received another shipping update or any tracking info. Finally on 12/22 I emailed Etrailer.com who told me they didn't know when I would get it. The Tonneau finally arrived on 12/29, 3 days after my son returned to California (he drove his truck, 2100 miles). He won't be back till next Christmas so I have to figure out how to return this product. I had several other buying options to get this here by Christmas, but went with Etrailer because of their reputation. This will be my last purchase from Etrailer.com.
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Martin Z.
9/19/2018
Great cover holds up really well, no problems