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Warehouse Direct Prices On BAK Industries Tonneau Covers By Cutting Out The Middle Man 

448133 – BAKFlip MX4 – Fits 2020-2022 GMC Sierra/Chevrolet Silverado HD 2500 3500 – 6′ 10″ Bed


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The BAKFlip MX4 has features, including matte-finished cab corner caps, clamps, and elevator bolts for a more streamlined look and feel. Other MX4 features include an enhanced functionality with pre-molded, die-cut, shock-absorbent bumpers and secure prop rod clips.


  • Premium matte finish
  • Durable aluminum panels
  • Rated up to 400 lbs. of evenly distributed weight
  • 5-year warranty
  • Dual-action tailgate seal (not applicable to 05-15 Tacoma or 05-16 Ridgeline)
  • 100% bed access
  • Finished corner caps featuring a softer seal for a more finished appearance
  • Pre-molded and die-cut A-panel and B-side bumpers
  • Prop rod clips securely designed for durability
  • Matte-finished elevator bolts and clamps


This heavy-duty, all-season truck bed cover is designed to perform in extreme conditions. MX4’s resilient infrastructure is for everyday use, featuring upgrades to the prop rod clips, rails, elevator bolts, and the A-panel and B-side bumpers that provide enhanced functionality and a more complete matte-finish look and feel. The MX4’s solid and robust design is flush mount, and backed by an extended 5-year warranty.

NOTE: Some 8' applications may not allow for 3rd brake light visibility due to the height of cab and light location.

Customer Reviews

Based on 182 reviews
Brian Roark
Bed Cover Review

Great bed cover for the price, good quality and easy to install.

Carol L Rusche-Lageman

Outstanding quality product I don’t know why I waited so long

David Helgeson
Perfect fit.

I was impressed right from unboxing the cover. The product was protected from any potential shipping damage. Instructions are very easy to follow. I had to cut away a small sliver at the top corners of the bed liner to make the cover sit flat. This was even explained in the instructions from Tonneau covered. Complete installation took about an hour. Had to dust away some foam particles and a few metal shavings at the drilled holes. Very satisfied with everything about my cover.

Richard Laughlin
MX4 BakFlip

I looked at a lot of Tonneau covers but I decided to go with the backflip MX4 you get what you pay for very solid I feel safe locking the back and not worrying about coming out and stuff being stolen from the back of my truck I think it’s very good quality.

Great product

By far the lowest price. Very happy with the purchase.

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