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  • Bak MX4 Sierra 6.6 bed
  • BAK MX4 448121
  • Sierra 1500 6.6 BAK Cover
  • 448121
  • BAK 448121


BAKFLIP MX4 Hard Folding Tonneau Cover 2014-2018 Sierra 1500 6.6FT Bed

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Product Description

BAK BAKFLIP MX4 Hard Folding Tonneau Cover Fits 2014-2018 GMC Sierra 1500 6.6FT Bed 


FITS: 2014-2018 GMC SIERRA 1500 WITH 6'6 BED



BAKFlip MX4, features heavy-duty aluminum matte finish panels that offer superior UV and scratch resistance, and an enhanced premium density foam core. The MX4 is the upgrade to the G2 aluminum series, equipped with upgraded latch housing components, and an all-new integrated tailgate seal that allows the tailgate to close with the cover-up or down.


BAKFlip MX4 has all the features of the G2 Plus:

Upgraded tailgate operation with premium dual action seal

Durable aluminum matte finish panels

Injection molded latch housing for long-term durability

Weight rated up to 400 Lbs.

Premium Density Foam Core

Advanced scratch and scuff resistance



The heavy-duty, all-season truck bed cover is designed to perform in the most extreme conditions. The MX4's resilient infrastructure is designed for everyday use, with upgraded components that provide enhanced resistance to the elements without compromising its sleek, low-profile look and feel. The MX4's solid and robust design is flush mount and backed by an extended 3-year warranty.


Technical Specs of BAKFLIP Tonneau Cover:

Exterior: Durable Aluminum Matte Finish

Core: EPS(insulated)

Finish: Matte

Locks: Upgraded Latch Housing For Long Term Durability

Hinge: Automatic Latching Panels

Thickness: ½ inch

Operation: Fold And Lock

Weight rating: 400 lb. evenly distributed

Weight of cover: 55 lb.

Maintenance: Wash with soap and water

Warranty: 3 years 

Product Videos

BAK Industries BakFlip MX4 Installation 07:32

Charly Henley, with BAK Industries, shows how easy it is to install the all new BakFlip MX4 tonneau cover. The MX4 features heavy-duty aluminum matte finish panels, enhanced premium density foam core, and upgraded latch housing components. An all new integrated tailgate seal allows the cover to be closed with the tailgate in the closed or open position. You will have 100% access to your truck bed and it is all backed by a 3-year warranty. More information:

  • BAK Industries...
    Charly Henley, with BAK Industries, shows how easy it is to in...

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