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  • Bring both style and function to your truck with the durable and lightweight BakFlip MX4 Aluminum Tonneau Cover
  • New and improved universal rear seal – closes with tailgate in the open or closed position
  • Fully opens for complete, 100% bed access
  • Standard model available, or choose to add the BakBox folding truck toolbox (not available for all vehicles)
  • Enhanced heavy-duty Aluminum construction – resistant to scratching and UV radiation
  • Injection molded latch housing for superior durability
  • Attractive Black flat matte finish
  • BakFlip Comparison Chart
  • Made in the USA
  • Backed by a 3-Year Warranty

Whether you’re loading your truck up with sand, cement, or concrete, or packing up for a weekend camping trip, your cargo needs to be protected, and your truck deserves to look good. If you want to add all the convenience of a locking trunk to the style and function of your pickup, equip your rig with the BakFlip MX4 Aluminum Tonneau Cover.

Not only do the enhanced heavy-duty aluminum panels look great in their flat matte finish – they also provide incredible resistance to scratches and UV rays. In addition, the premium density foam core stands up strong to heavy use and abuse. The newly upgraded rear seal is universal, and allows you to close your cover while the tailgate is in the open or closed position - no need to worry about damaging your cover when you close the cover in a hurry.

Your BakFlip MX4 Aluminum Tonneau Cover is rated to hold up to 400 lbs of evenly distributed weight right on top. The latch housing is injection molded, for supreme durability that will last for the long haul. This cover is made in the USA and backed by a 3-Year Warranty.

Optional Upgrade: Choose the Standard BakFlip MX4 model, or maximize your truck bed's functionality by adding the optional BakBox Folding Toolbox. This truck toolbox is strong, lightweight, easy to handle, and works seamlessly with the BakFlip MX4. (BakBox not available for all vehicles.)

BakFlip MX4 Tonneau Cover Customer Reviews

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Overall Rating:

4.8 of 5

Average Install Time: 30-60 minutes

Showing 10 of 296 reviews. See All Reviews.

who drives a Chevy Silverado
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Looks great, great quality, sturdy, easy to install. I would recommend to 2 persons to install. Looking forward to many years of use. It looks like it was built with truck.

Install Time: 30-60 minutes

who drives a Chevy Silverado
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Great product, easy to install, works as represented. Haven't been in any rain yet, I do had some concern about how tight it might be but after going to the car wash with no leaking inside it looks great so far.

Install Time: Under 30 minutes

who drives a Toyota Tundra
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Looks really good. I do like it a lot. One issue I have is the right side does not sit even with the left side on the tail gate. The left side sits flush, but the right side is about a 1/4' higher. I took the cover off, realigned everything, tightening everything down and the cover is still higher on the right side.

Install Time: 1-2 hours

who drives a Toyota Tacoma
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I installed my tonneau cover without any help. I am 74 years old. The install was relatively easy. I would be even happier with my purchase if it didn't leak. But since the way in which the water is channeled, I don't expect any serious problems with the water getting any haulage seriously wet.

Install Time: 2+ Hours

who drives a Ford F450
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Knobs were cheap plastic can’t over tighten with cracking often come loose.

Install Time: 30-60 minutes

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I had an MX4 on my 2015 Ram Limited with Ramboxes. It was a good cover but the 2 intermediate latches came apart after a couple of years. When I change my truck for a 2019 limited with ramboxes I decided to try a different product but was even more disappointed, it leaked even after spending close to $50.00 in neoprene strips to try to make it water resistant. Fortunately Kathy and Auto Accessories were great and I was able to switch back to the MX4. This new product looks and works a lot better than the old one I had. I was pleasantly surprised that they put a lot of thought behind their new design. I would had given them a 5 star but the new rails slide into the Ram rails that come with the rambox option. According to BAK they supposed to go in with soap and water but mine I had to put grease and hammer them in (no way they are coming out). As per BAK it appears to be a Ram issue as some of their rails are not the same The driver side went in a lot easier that the passenger side). After a couple of heavy rain the bed was dry but I had to install a piece of neoprene gasket at the exposed area next to the truck bed between the tailgate and the truck panel behind the ramboxes (the new rams have about a 3/4 gap there).

Install Time: 1-2 hours

who drives a Chevy Silverado
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The produce was difficult to install. It was very heavy for a 71 y/o. Instructions were clear. The product for a 2018 Chevrolet Silverado should have included the shims to help to water seal the rails to the plastic rail covers on the LT Silverado.

Install Time: 2+ Hours

who drives a Ford F350
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Was easy to install. I like the flat fit and look.

Install Time: 30-60 minutes

who drives a Dodge Ram 1500
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Installation was easy for 1 person. Take your time and get it squared up. Went thru the car wash after to see how it was sealed. Just a little water got in near the tailgate, nothing that a tailgate seal will not fix. Though it is still early/new I am pleased with this cover. I had a similar style Undercover in the past and like the looks, fit and price of this one better.

Install Time: 30-60 minutes

who drives a GMC Sierra
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Pretty simple and straight forward install, instructions were clear as day and very well said. So far I am very pleased with the install and overall quality of the cover and I do not expect that to change.

Install Time: Under 30 minutes

Showing 10 of 296 reviews. See All Reviews.