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The MX4 uses ½" thick, rustproof aluminum panels with a premium density foam core for strength. Each panel is rated to hold up to 400 lbs of evenly distributed weight, so you can load gear or boxes on top without worry. The matte black finish resists scratches, scuffs, and UV rays, so it keeps its look even after years in the sun or through harsh conditions. It’s a solid choice for anyone who needs a cover that lasts through work weeks and weekend trips.
You don’t have to take the cover off to haul taller cargo. The MX4’s quad-fold design lets you flip up sections for partial or full access to the bed in seconds. When you need the entire bed open, prop rods secure the folded panels upright at the cab so you can drive with the bed fully exposed. That means you can load lumber, coolers, or bikes without removing the cover.
Matte black rubber seals and a built-in drainage system help keep water out of the bed during rain or washes. Automatically latching panels lock down when the tailgate is closed, creating a secure truck bed that protects gear from both weather and theft. The rear seal design lets you open and close the tailgate whether the cover is open or closed—no need to lift it first.
This cover sits flush inside your bed rails for a low-profile look that blends well with the truck’s lines. Because it mounts inside the rails, you keep access to stake pockets, tie-downs, and accessories like ladder racks or raised rails. Installation is simple with no drilling required—frame rails clamp in place, and bolts secure the front hinge rail for a snug fit that stays put through daily use.
When you want extra organization without giving up bed space, the MX4 works with the optional BakBox2 storage box (sold separately). It folds flat when not in use or turns into a handy shelf for smaller gear. This setup keeps tools, straps, and small items easy to reach under the sturdy protection of the MX4 cover.
Ratings & Reviews
I own three of these on three different trucks. The two I purchased this year and last year are not as good quality as the one I purchased in 2023.For the price they are feeling pretty cheap now and parts are falling off. Latch covers and rubber par to rest the top on when folded up have fallen off on both of the covers. I will not be buying these brand covers again.
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.
I replace a camper shell with the tonneau cover because it is easier to remove when I want to put my pickup camper on the pickup. I am very happy with the cover and am glad I made the switch.
Excellent product! Wait time was crazy but manufacturer is to blame on that one!
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
The cover functions ok. The tailgate leaks quite a bit. The manufactured edges that where cut were sharp and not painted or treated. The weather strip along the edges has already discolored/faded. Disappointed in the fading and less than ideal sharp edges. Somewhat expected leaks, but not this much. Average at best rating, especially for the price.
I installed the BAKFlip MX4 in my RAM 2500 Crewcab has the 6' 1/2 short bed, drived 300 miles now. good product, open and close the tailgate without lifting up the cover
Great fit on a Ram 2500 long bed. Everything stays dry on the inside.
I have been using this cover for almost a year now, and am very pleased with it. It looks and fits great, and it is secure and keeps most of the bed dry in the rain. A couple of rubber trip bits have needed some improved securing, and I used a little RTV so it was easy. I drove it across the country round trip last summer and it was perfect. I would recommend this cover for a great-looking and pretty secure cover. Finally, it is easy to fold forward when it is time to haul loads taller than the bed rails.
Great tonneau cover. Fits as it should.
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!
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.
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.
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.
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.
A very well built product. Form, fit and function met all expectations.
Works great. No problems.
No regrets at all. We love this cover.
It’s worked great.
A fellow worker suggested it to me,
And one of my sons got one.
A second son is hoping to get one soon.
I always had a topper, so this is different,
But it’s been great and convenient.
Easy to install. Doesn't leak. Easy to clean, and seems to have improved my fuel mileage a bit. I am happy and would highly recommend this cover. Fits my 2018 Silverado perfectly.
Love the look and the fit of the BAKFlip MX4 but after a light hail storm it is riddled with dents. My 2018 GMC has no damage but the cover does. Bummed.....
Had it a if a year and this thing takes a beating and it doesn’t have a dent or scratch to show for it. I love it! If your contemplating, don’t! It keeps almost all the water out, except by the tailgate which is normal for any cover. Outstanding product!
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.
Do you have a question about this Tonneau Cover?
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James
3/29/2024
After a year, the only issue that I have had with the BAKFlip cover is that the small pieces between the larger panels do not stay in place well, and the process of flipping the panels back down in place requires that you hold those connector pieces in place so that they settle correctly into place. I use some gorilla tape to hold them in place, but that shouldnt be necessary. Otherwise, it has been a great addition to the truck! I like being able to leave things in the pickup bed that are out of sight and dont fly out or get stolen.