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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 277 reviews. See All Reviews.

who drives a Ford F150
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Fits & Looks very nice. Very easy to install. Just what I wanted. Thanks

Install Time: 30-60 minutes

who drives a Chevy Silverado
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My third BacFlip and I really like the MX4 that allows for the tailgate to be closed with the top down. Not a big deal but with my other two the uninformed would close the gate with the top down. Install was simple and no drilling is always a plus. Highly recommend this top and have had compliments on this already. Installed on a '19 Silverado HD with 6'6" standard bed.

Install Time: 30-60 minutes

who drives a Toyota Tundra
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Nice cover but had to cut the rail to fit it properly.

Install Time: 1-2 hours

who drives a Toyota Tundra
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The BakFlip MX4 was easy to install! Adjustments for proper fit were simple and few. It is helpful to have a neighbor that is mechanically inclined and retired to assist in the installation! It would have been possible to have done the install by myself, but my recommendation is to have assistance. Two days after installing the MX4, I drove through a snow storm in Durango, CO. Cargo remained safe and dry! Looks Great on my '08 Tundra CrewMax Ltd! The most time consuming step in the install was removing and reinstalling the OEM Cargo Rails. The BakFlip came with all of the necessary adapters. Minor defect is that one of the rails had a bend in it that did not affect overall performance!

Install Time: 1-2 hours

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One thing was a missing sealant on one of the rails. I'm supposed to receive sealant but hopefully it'll be a breeze to add the sealant without any issues. However, looks great on my Tacoma :-)

Install Time: 1-2 hours

who drives a Nissan Titan
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This is a great product and easy to install.

Install Time: 1-2 hours

who drives a GMC Sierra
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Works great! Like a charm.

Install Time: Under 30 minutes

who drives a Chevy Colorado
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The first cover I received had shipping damage (bent side rail, small dents in one panel) as well as a small cut in one of the cover gaskets that was likely missed by QC. BAK replaced the whole cover and the second one was received in near perfect condition (just one small dent in one of the side rails that doesn't affect the cover and is not visible when the cover is closed). The cover went on without any issues. The instructions are clear enough but be sure to put the cab/bulkhead seal at the back edge not towards the cab. Also, the angle shims (2019 Chevy Colorado) need to be put between the metal bed rail and the plastic fascia, not between the fascia and BAK's side rail like the shimming sheet suggests. Lastly, when installing the star knobs and bolts you need to drill a hole in the foam gaskets on the bottom side of the panel. It took a little fussing to get the cover perfectly square but once it's installed it operates easily and looks great. I just installed it today so can't say how water proof it is but the gaskets look like they will do a fair job of keeping water out.

Install Time: 1-2 hours

who drives a Toyota Tundra
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Product looks great installed and I like the BAK box with it. Clamps didn’t seat as securely as I thought they should but the product is holding.

Install Time: 1-2 hours

who drives a Dodge Ram 1500
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I can only review the initial install at this point. Fit was a bit tight. Had to relocate 4 latches to allow proper fit by redoing screws. Should have easier way to adjust. Had a lot of rain lately, and repels water good. Appearance is good.

Install Time: 1-2 hours

Showing 10 of 277 reviews. See All Reviews.