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  1. Tonneau Covers
  2. BAK Industries
  3. Fold-Up - Hard
  4. Flush Profile - Inside Bed Rails
  5. Rack Compatible
  6. Aluminum
BAKFlip MX4 Hard Tonneau Cover - Folding - Aluminum - Matte Finish

BAKFlip MX4 Hard Tonneau Cover - Folding - Aluminum - Matte Finish

Item # BAK448133
Retail:$1,576.41
Our Price: $1,199.99
You Save: $376.42
Tonneau Covers

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Shipping Weight: 71 lbs
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Get style and versatility with this heavy-duty, all-aluminum tonneau. Quad-fold cover sits inside your vehicle's bed rails and secures upright for unrestricted bed access. Tailgate opens and closes with cover up or down. Matte black finish. Great Prices for the best tonneau covers from BAK Industries. BAKFlip MX4 Hard Tonneau Cover - Folding - Aluminum - Matte Finish part number BAK448133 can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
  • All Info
  • Reviews (99)
  • Q & A (0)
  • Photos

BAK Industries Tonneau Covers - BAK448133

  • Fold-Up - Hard
  • Flush Profile - Inside Bed Rails
  • BAK Industries
  • Rack Compatible
  • Aluminum
  • Matte
  • Opens at Tailgate

Get style and versatility with this heavy-duty, all-aluminum tonneau. Quad-fold cover sits inside your vehicle's bed rails and secures upright for unrestricted bed access. Tailgate opens and closes with cover up or down. Matte black finish.


Features:

  • Custom-fit tonneau cover protects your cargo and your vehicle's bed from the elements
    • Aerodynamic style reduces wind drag, improving gas mileage
  • Quad-fold design allows for partial or full truck bed access in seconds without having to remove cover
    • Prop rods let you secure folded cover in upright position so you can drive with truck bed completely open
    • Integrated buckle system lets you secure the cover in the folded, flipped up, or closed position
  • Low-profile cover sits inside your truck bed rails
    • Compatible with stake-pocket-mounted accessories and raised side rails
  • Automatically latching panels create a secure truck bed when tailgate is closed and locked
    • Rear seal lets you open and close tailgate with cover open or closed
  • Matte black rubber seals and built-in drainage system help to keep water out of bed
  • 1/2" Thick, rustproof aluminum panels are sturdy and durable
    • Premium density foam core adds strength
    • Cover rated to hold up to 400 lbs of evenly distributed weight
  • Matte black finish is resistant to scratches, scuffs, and UV rays
  • Aircraft-grade, rustproof aluminum rails with black powder coat finish create base for tonneau
  • Easy, no-drill installation
    • Frame rails clamp to the inside of your truck bed side rails
    • Included bolts secure front hinge rail to frame rails
  • Compatible with BakBox2 (sold separately)
  • Made in the USA
  • 5-Year warranty


448133 BAK Industries BAK Flip MX4 Hard Folding Truck Bed Cover

Installation Details BAK448133 Installation instructions

This Product Fits The Following Vehicles



California residents: click here



Customer Reviews

BAKFlip MX4 Hard Tonneau Cover - Folding - Aluminum - Matte Finish - BAK448133

Average Customer Rating:  4.7 out of 5 stars   (99 Customer Reviews)

Get style and versatility with this heavy-duty, all-aluminum tonneau. Quad-fold cover sits inside your vehicle's bed rails and secures upright for unrestricted bed access. Tailgate opens and closes with cover up or down. Matte black finish.

by:

Works great and 5th wheel hitch fits underneath and when folded up I can hitch up my trailer without removing cover. Only issue is the corner pieces on the end section came off and I can’t get manufacturer to help me get replacement.



by:

This cover is great. My only wish is it could fit a little tighter side to side. I've had it 1 year and it has worked and held up perfectly.



by:

Good quality and relatively easy to install !!
Good value for the money too !!



by:

I love it, I’ve owned three



by:



by:

I have owned this cover for over a year and it has been excellent. It keeps the bed fairly dry as expected and I have had no mechanical issues with it as it still performs like new. I would say the only improvement I would suggest is better foam weather striping for the front of the bed as the original never stuck to the spray in liner very well and eventually came lose and then I just swapped with some similar weather striping I bought locally.



by:

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.



by:

Well made cover. A lot sturdier than I thought it would. Its not full proof so water does get in the bed but it's minimal. The cover partially blocked my tool box which sit in the bed, so I removed the tool box cover for easy access.



by:

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.



by:

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!



by:

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



by:

This tonneau cover can be installed by one person. It works great. It is water proof in the rain.



by:

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.



by:

the bedcover finally came in.
Few pictures
of it installed.



by:

This is the third MX4 that I have owned. This one is on Ford’s Maverick. The first two fit well but not perfect. I don’t really know if the slight issues were the fault of the truck or the cover. This cover is the best yet. Absolutely no leaks!! The fit to the tailgate is very uniform!! When ever I need a cover, I don’t even look at te competition. These are great covers.



by:

I really love the bakFlip cover. It locks up all my stuff when we are on the road. I really like the looks too.



by:

After a year of using the cover I found that there are a few things that could be improved and you can do some of these yourself.
The knobs for the cover that actually hold it into the bed-vibrate loose. I added my own lock washers. The poles that you use to hold the cover up when the cover is raised up against the back window-they also vibrate loose-so often that I just removed them and keep them under my seat. The little u-clip pole holders for the poles when not in use-they are too weak-often letting the poles jump out or fall out during normal road driving.
The cover itself is not waterproof --it sheds water away mostly however enough gets into the bed that you can not trust your items to be dry. Bag important stuff to keep it dry.
The rear weather seal slides back and forth too easily--sometimes working itself out about 2 inches until you see it and slide it back into place--i addenda small amount of silicone to stop this from moving.
The cover is strong, looks good and is mostly what I was looking for. Unfortunately I would not buy this again-even more because you have to relocate the bed accessory rails-which then limits the items you can buy for your truck because they are designed for the rails to be in the factory positions.
My next cover will be a roll up so that it allows visibility out of the back window. When this cover is flipped up to its final position it completely blocks the rear window. When I was looking at covers-my thought was well its the coolest looking cover and I can deal with not seeing out the back window--well that has changed. It is not practical. The price is high and there are many other options out there that are. My soft roll up tonneau cover was great-waterproof and I could have bought 6 of them for this price. If one was damaged it would have been better to just throw it away and order a replacement. Sorry guys-look elsewhere for a better cover.



by:

I love the cover, very sturdy and has held up very nice for 1 year. The one issue is, I have a long bed Ram and when I fold it up against the cab, it covers the camera for the bed. This is a design flaw and if you use the bed camera when you have a load in the bed and the cover is folded all the way up, you can't use it.



by:

I've had the cover for one year now and the cover has gone through the worst California winter weather for the last 3o years. It kept my stuff 99% dry! It's not 100% leakproof and that was expected but given the conditions esp during rainy season, it has performed above expectations.



by:

Solid performance. Only issue is with the glue holding the pads is failing



by:

Excellent cover for the truck. Easy straight forward install. Built to outlast the truck.



by:

Love the MX4 ...Took a little longer to install but looks great...



by:

This is the second BAKFlip i've owned they vare great,going thru etrailer is an easy process



by:

It was very easy to install even though I had never installed a tonneau cover before. One year later, the finish is still excellent. I never installed the drain tubes to divert any water from the outside but very little water ever infiltrates past the cover even when I wash the cover with my hose. One minor thing that can be an issue is when unlatching and latching the middle of the five panels, the end cap on the hinge near the bedrails sometimes disengages. The cover still closes if I didn't notice the disengagement but I'll just flip back and tuck the end cap back in to the hinge, no big deal. Overall very sturdy and durable. My neighbor wants one now.



by:

Great durable product. Looks great too. Super easy to install.


25
99
Show More Reviews

See what our Experts say about this BAK Industries Tonneau Covers

  • Differences Between BAK BAKFlip G2 and MX4 Hard Folding Tonneau Cover for 2022 GMC Sierra Short Bed
    In a nutshell, the MX4 part # BAK448133 is of a slightly higher quality than the # BAK226133 G2. The MX4 has a 5 year warranty versus the 3 year for the G2. The MX4 has a matte finish that does a better job of hiding imperfections and scratches than the gloss finish used on the G2, and the MX4 just feels a bit more substantial as if it'd hold up a bit better over time. Also, the rear seal of MX4 allows you to close the tailgate whether the tonneau is open or not. With the G2, the tonneau...
    view full answer...
  • Comparing The BAKFlip F1 And BAKFlip MX4 For The 2020 GMC Sierra 2500 With 6-3/4 Bed
    The BAKFlip F1 Hard Tonneau Cover - Folding - Aluminum and Fiberglass # BAK772133 and BAKFlip MX4 Hard Tonneau Cover - Folding - Aluminum - Matte Finish # BAK448133 are very similar but there are a few minor differences. The F1 has a rough texture that tends to hold up better against various conditions and does not get easily scratched or dented. The MX4 has a smoother appearance and texture and does not have a rough look or feel to it. I think the F1 looks better and it holds up better...
    view full answer...
  • Is BAKFlip MX4 or F1 Tonneau Cover Better for 5th Wheel on 2022 Chevy Silverado 3500 Short Bed
    While there are minor differences between the two BAKFlip tonneau covers for your 2022 Chevy Silverado 3500 with a 6-1/2 foot bed, for the purposes of using either cover when towing a 5th wheel, there is no real advantage with either the BAKFlip MX4 Hard Tonneau Cover # BAK448133 or BAKFlip F1 Hard Tonneau Cover # BAK772133. The biggest difference between the two is that the F1 has more robust panels, made out of a reinforced polymer (a type of plastic designed for durability) and measuring...
    view full answer...
  • What is the Difference Between the BAKFlip G2 and MX4 for 2020 GMC Sierra 3500 Short Bed
    The main difference between the G2 # BAK226133 and the MX4 # BAK448133 is that the MX4 can remain latched in position when latching the tailgate. With the G2 the cover must be unlatched to latch the tailgate. This can become kind of a pain if you're leaving the cover in position for an extended period, but constantly at the tailgate. The G2 also has a glossy finish on it, while the MX4 has more of a matte finish and is generally a more sturdy cover when it comes to holding up over time. At...
    view full answer...
  • Rightline Truck Bed Tent Compatibility With A 2022 GMC Sierra 3500 With A BAKFlip MX4 Tonneau Cover
    The Rightline Truck Bed Tent # RL110730 attached more to the outside of the bed so you'll have no issues using it on your 2022 GMC Sierra 3500 in conjunction with your BAKFlip MX4 # BAK448133 tonneau cover.
    view full answer...
  • Do the Truck Hero TS Rais Work with the Gator EFX Covers
    Yes the TS Rails for Truck Hero Elevate Rack System part # TH65FR will work out well with your Gator EFX Tonneau Cover. The design of the Gator EFX is very similar to that of the BAKFlip MX4 Hard Tonneau Cover part # BAK448133 which is confirmed to fit with the TS Rails.
    view full answer...
  • Would BAKFlip MX4 Tonneau Cover Block Third Brake Light Camera of 2024 Chevy Silverado 3500
    With the BAKFlip MX4 # BAK448133 installed on your 2024 Chevy Silverado 3500 short bed it would block the third brake light camera when folded up but I do have a solution that would work. Instead you would want to go with a retracting tonneau cover like the part # PE63CV which would give you access to the bed for your gooseneck hitch and allow you to use camera.
    view full answer...
  • Adarac Ladder Rack Compatible With The BakFlip Mx4 Tonneau Cover On A 2021 Chevrolet Silverado 2500
    If you have the BackFlip MX4 # BAK448133 tonneau cover on your 2021 Chevrolet Silverado 2500 then you can use the Adarac Pro Series Ladder Rack # A4003991. You will need to get this rack because the towers holding the crossbar up is completely upright. These only come in silver. This one comes in black # A4004148 but won't work because of the towers tapering inward. You will most likely have contact with your first panel on your tonneau cover with the tower when you're folding it up.
    view full answer...
  • Rapid Switch Pro On A 2021 GMC Sierra 2500 HD with 610 bed with Bakflip MX4
    The BakFlip MX4 is compatible with the Rapid Switch Ladder Rack # RS77FR. These systems work well together and the Rapid Switch System is the same for the 8 foot and 6-3/4 foot bed. For your tonneau cover, it all depends on the length of your bed. If you're wanting to get the BakFlip MX4 and you have a 8 foot bed, get this one # BAK24FR and if you have the 6-3/4 foot bed get this one # BAK448133. The rails are long enough to go from the bulkhead of the bed to the tailgate. I have an installation...
    view full answer...
  • Thule TracRac SR Compatibility With BAKFlip MX4 Folding Tonneau Cover
    Technically, the Thule TracRac SR Sliding Truck Bed Ladder Rack w/ Cantilever - 1,250 lbs, part # TH44RE, will fit your vehicle with the MX4 tonneau cover. But you will have to shift the uprights of your ladder rack anytime you open your tonneau cover. The overlap of your BAKFlip MX4 Hard Tonneau Cover - Folding - Aluminum - Matte Finish, part # BAK448133, is not the reason the Thule TracRac SR is not the best fit for your 2022 Chevrolet Silverado 2500. Your tonneau cover is a tri-fold....
    view full answer...
  • Ladder Rack Recommendation for a 2023 GMC Sierra 2500 with a BAKFlip MX4 Cover
    Technically, yes, the BAKFlip MX4 Hard Tonneau Cover and TracRac SR Ladder Rack (with the Cantilever) will fit together on your 2023 GMC Sierra 2500: - BAKFlip MX4 Hard Tonneau Cover # BAK448133 - Thule TracRac SR # TH94RE - Thule TracRac SR (w/Cantilever) # TH44RE The reason this isn't a definitive "yes" is while the tonneau cover will be able to open (you might have to shift the uprights of the rack to accomplish this), the rubber seals on the sides of the BAKFlip MX4 panels will...
    view full answer...
  • Does BAKFlip MX4 Tonneau Cover For 2022 Chevy Silverado 2500 Standard Bed Fit w/ Adarac Ladder Rack
    Yes, the BAKFlip MX4 tonneau cover is absolutely compatible with the Adarac Aluminum Series ladder rack on your 2022 Chevy Silverado 2500. The correct part numbers for the cover and rack that fit your truck are the following: - BAKFlip MX4 Hard Tonneau Cover # BAK448133 - Adarac Aluminum Series Custom Truck Bed Ladder Rack - Aluminum Finish # A4003992 or Matte Black # A36HG The MX4 installs inside your Chevy's bad rails, while the Adarac uses the stake pocket mount on top of the bed...
    view full answer...
  • Recommended Tonneau Cover For a 2024 GMC Sierra 2500 Compatible With Thule TracRac Ladder Rack
    I recommend installing the BAKFlip MX4 Hard Tonneau Cover on your 2024 GMC Sierra 2500. You will need either the 6-3/4' # BAK448133 or 8' # BAK24FR cover depending on your bed length. These covers will fit the Thule TracRac which fit the SR rails. If you have a TracRac TracONE # TH27000XT style ladder rack you will need the following components to convert it to fit the SR Rails. Modular Base LF/RR # TA01-42003 Qty 2 Modular Base RF/LR # TA01-42004 Qty 2 Knob # TAKB-90030-1 Qty 4 Nylon...
    view full answer...

Do you have a question about this Tonneau Cover?


Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Jameson C
Expert Research:
Jameson C
Employee Tyler C
Edited by:
Tyler C
Employee Wilson B
Updated by:
Wilson B
Employee Noah M
Updated by:
Noah M
Employee Zach D
Video Edited:
Zach D
Employee Mark S
Written by:
Mark S

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