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Authorized Brand Dealer
Fulfillment From Multiple U.S. Warehouses
Enthusiast Owned & Supported
Easy Financing Available!
Authorized Brand Dealer
Fulfillment From Multiple U.S. Warehouses
Enthusiast Owned & Supported
Easy Financing Available!
Authorized Brand Dealer
Fulfillment From Multiple U.S. Warehouses
Enthusiast Owned & Supported
Easy Financing Available!
Authorized Brand Dealer
Fulfillment From Multiple U.S. Warehouses
Enthusiast Owned & Supported
Easy Financing Available!
Authorized Brand Dealer
Fulfillment From Multiple U.S. Warehouses
Enthusiast Owned & Supported
Easy Financing Available!
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BAK
BAK BAKFlip MX4 Matte Folding Tonneau Cover for Select 2019-2026 GMC Sierra/Chevy Silverado 1500 (5' 8" CarbonPro Bed) 448135
$1,249.99
This product will be available for sale in 2 weeks, but you can pre-order now to receive 10% discount!
Fits select 2019-2026 GMC Sierra 1500 and 2026 Chevrolet Silverado 1500 models equipped with the 5ft 8in CarbonPro bed. This third-generation BAKFlip MX4 evolution features heavy-duty aluminum top panels reinforced with high-density polymer cores, offering a 22% increase in strength over previous iterations.
Designed for a flush-mount profile that sits inside the bed rails, the MX4 GEN 3 provides complete bed access by folding against the cab with protective rubber bumpers. Security is managed through a patented automatic latching system with re-engineered lock components for superior resistance to forced entry. The updated EPDM rubber perimeter seals and a 13% longer dual-action tailgate seal ensure maximum weather protection while allowing the tailgate to operate regardless of the cover's position.
- Manufacturer Part Number: 448135
- Heavy-duty aluminum panels with high-density polymer reinforcement
- Textured matte black finish is scratch and UV resistant
- 400 lbs. weight capacity (evenly distributed)
- Re-engineered perimeter seals and tight-fit clamps
- Click-in design reduces installation time by 12%
- Full 3rd brake light visibility when open
- Integrated water drainage system
- Assembled in the USA
- 5-year warranty
📘 Guides & Manuals
🔧 Fitment & Compatibility
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2026 | Chevrolet | Silverado 1500 | Custom |
| 2026 | Chevrolet | Silverado 1500 | Custom Trail Boss |
| 2026 | Chevrolet | Silverado 1500 | High Country |
| 2026 | Chevrolet | Silverado 1500 | LT |
| 2026 | Chevrolet | Silverado 1500 | LT Trail Boss |
| 2026 | Chevrolet | Silverado 1500 | LTZ |
| 2026 | Chevrolet | Silverado 1500 | PPV |
| 2026 | Chevrolet | Silverado 1500 | RST |
| 2026 | Chevrolet | Silverado 1500 | WT |
| 2026 | Chevrolet | Silverado 1500 | ZR2 |
| 2019-2026 | GMC | Sierra 1500 | AT4 |
| 2022-2026 | GMC | Sierra 1500 | AT4X |
| 2019-2021 | GMC | Sierra 1500 | Base |
| 2019-2026 | GMC | Sierra 1500 | Denali |
| 2022-2026 | GMC | Sierra 1500 | Denali Ultimate |
| 2019-2026 | GMC | Sierra 1500 | Elevation |
| 2022-2026 | GMC | Sierra 1500 | Pro |
| 2019-2026 | GMC | Sierra 1500 | SLE |
| 2019-2026 | GMC | Sierra 1500 | SLT |
Choose your Location
-
Atlus
1340 Cobb Dr, Unit 1, Eustis, FL 32736
352-234-4458
Mon – Fri: 8:30 am – 4:30 pm
Sat: 9:00 am – 2:00 pm
Sun: Closed
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If you can find the part for a lower price from an authorized dealer/shop, we'll match the price! Reach out to Hello@AtlusAuto.com, our live chat located at the bottom right of your screen, or request an Atlas Price Guarantee, or visit our dedicated APG page to submit a request.
BAK BAKFlip MX4 Matte Folding Tonneau Cover for Select 2019-2026 GMC Sierra/Chevy Silverado 1500 (5' 8" CarbonPro Bed) 448135
$1,249.99
This product will be available soon, but you can pre-order now to get on the list before others!
US Based Support - In Florida
30 Days Satisfaction Guarantee
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Share:
$1,249.99
$1,249.99
$1,249.99
Fits select 2019-2026 GMC Sierra 1500 and 2026 Chevrolet Silverado 1500 models equipped with the 5ft 8in CarbonPro bed. This third-generation BAKFlip MX4 evolution features heavy-duty aluminum top panels reinforced with high-density polymer cores, offering a 22% increase in strength over previous iterations.
Designed for a flush-mount profile that sits inside the bed rails, the MX4 GEN 3 provides complete bed access by folding against the cab with protective rubber bumpers. Security is managed through a patented automatic latching system with re-engineered lock components for superior resistance to forced entry. The updated EPDM rubber perimeter seals and a 13% longer dual-action tailgate seal ensure maximum weather protection while allowing the tailgate to operate regardless of the cover's position.
- Manufacturer Part Number: 448135
- Heavy-duty aluminum panels with high-density polymer reinforcement
- Textured matte black finish is scratch and UV resistant
- 400 lbs. weight capacity (evenly distributed)
- Re-engineered perimeter seals and tight-fit clamps
- Click-in design reduces installation time by 12%
- Full 3rd brake light visibility when open
- Integrated water drainage system
- Assembled in the USA
- 5-year warranty
📘 Guides & Manuals
🔧 Fitment & Compatibility
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2026 | Chevrolet | Silverado 1500 | Custom |
| 2026 | Chevrolet | Silverado 1500 | Custom Trail Boss |
| 2026 | Chevrolet | Silverado 1500 | High Country |
| 2026 | Chevrolet | Silverado 1500 | LT |
| 2026 | Chevrolet | Silverado 1500 | LT Trail Boss |
| 2026 | Chevrolet | Silverado 1500 | LTZ |
| 2026 | Chevrolet | Silverado 1500 | PPV |
| 2026 | Chevrolet | Silverado 1500 | RST |
| 2026 | Chevrolet | Silverado 1500 | WT |
| 2026 | Chevrolet | Silverado 1500 | ZR2 |
| 2019-2026 | GMC | Sierra 1500 | AT4 |
| 2022-2026 | GMC | Sierra 1500 | AT4X |
| 2019-2021 | GMC | Sierra 1500 | Base |
| 2019-2026 | GMC | Sierra 1500 | Denali |
| 2022-2026 | GMC | Sierra 1500 | Denali Ultimate |
| 2019-2026 | GMC | Sierra 1500 | Elevation |
| 2022-2026 | GMC | Sierra 1500 | Pro |
| 2019-2026 | GMC | Sierra 1500 | SLE |
| 2019-2026 | GMC | Sierra 1500 | SLT |
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We only sell authentic products from verified brand partners and retail partners globally.
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