Exterior Components› Car and Truck Covers

BAK

135 SET BAK MX4 19-24 GM Sierra 1500 (Carbon Pro Bed) 5.9ft Bed

$329.99

SKU: B002 448135-RAILS

Special Order
Special Order
Ships in 4–6 weeks
Free Shipping
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Easy — 1–2 hours

Description

The BAKFlip MX4 (GEN 3) is a durable, matte black hard folding tonneau cover for 2019-2026 GMC Sierra 1500 CarbonPro 5'9" beds, offering enhanced security, weather protection, and 100% bed access.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandBAK
Part NumberB002 448135-RAILS

Videos

How to Install RealTruck BakFlip MX4 (Gen3) Hard Folding Tonneau Cover on a 2024 GMC Sierra

How to Install RealTruck BakFlip MX4 (Gen3) Hard Folding Tonneau Cover on a 2024 GMC Sierra
BAKFLIP MX4: 18 Month Follow-Up

BAKFLIP MX4: 18 Month Follow-Up
Mx4 Bakflip Truck Bed Cover Is The Best We’ve Found!

Mx4 Bakflip Truck Bed Cover Is The Best We’ve Found!
How to Install BAKFlip MX4 Tonneau Cover

How to Install BAKFlip MX4 Tonneau Cover

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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