---
product_id: 437780949
title: "BAK BAKFlip MX4 Hard Folding Truck Bed Tonneau Cover | 448131 | Fits 2019-2023 Chevy/GMC Silverado/Sierra, works w/MultiPro/Flex tailgate 6' 7\" Bed (79.4\")"
brand: "realtruck"
price: "¥661972"
currency: JPY
in_stock: true
reviews_count: 5
category: "Real Truck"
url: https://www.desertcart.jp/products/437780949-bak-bakflip-mx4-hard-folding-truck-bed-tonneau-cover-448131
store_origin: JP
region: Japan
---

# Supports up to 400 lbs weight Auto-locking aluminum panels Matte finish resists scratches & UV BAK BAKFlip MX4 Hard Folding Truck Bed Tonneau Cover | 448131 | Fits 2019-2023 Chevy/GMC Silverado/Sierra, works w/MultiPro/Flex tailgate 6' 7" Bed (79.4")

**Brand:** realtruck
**Price:** ¥661972
**Availability:** ✅ In Stock

## Summary

> 🚛 Elevate your truck game with the MX4 — where style meets unstoppable security.

## Quick Answers

- **What is this?** BAK BAKFlip MX4 Hard Folding Truck Bed Tonneau Cover | 448131 | Fits 2019-2023 Chevy/GMC Silverado/Sierra, works w/MultiPro/Flex tailgate 6' 7" Bed (79.4") by realtruck
- **How much does it cost?** ¥661972 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/437780949-bak-bakflip-mx4-hard-folding-truck-bed-tonneau-cover-448131)

## Best For

- realtruck enthusiasts

## Why This Product

- Trusted realtruck brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Full Bed Freedom:** 100% bed access with easy fold-up design that never blocks your 3rd brake light.
- • **Seamless Security:** Automatically locks as you close for ultimate cargo protection.
- • **Sleek Matte Armor:** Premium matte aluminum finish guards against scratches, fingerprints, and UV damage.
- • **Heavy-Duty Load Ready:** Engineered to hold up to 400 lbs of evenly distributed weight—work or play, covered.
- • **Effortless Installation & Support:** Quick install under an hour with clear instructions and backed by a 5-year hassle-free warranty.

## Overview

The BAKFlip MX4 Hard Folding Truck Bed Tonneau Cover fits 2019-2023 Chevy/GMC Silverado/Sierra 6'7" beds, featuring durable aluminum panels with automatic locking, a scratch-resistant matte finish, and full bed access without blocking the 3rd brake light. Rated to support 400 lbs, it offers superior cargo protection, easy installation, and a 5-year warranty backed by US-based support.

## Description

The BAKFlip MX4 was the first matte-finished, hard folding cover to market, becoming America’s #1 Selling Hard Folding Cover in just a few years. Simply put, the MX4 just looks better than other covers. Its sleek no-profile appearance allows you to maintain the appearance of your truck, while enabling you to securely stow cargo in the bed. The MX4’s pioneering, textured matte-finish adds a premium look and feel while also protecting against UV damage, annoying finger print marks, and scratches. MX4 has everything you expect from a premium cover. The engineers at BAK Industries fine-tuned even the smallest elements of the cover, down to adding cab corner caps and rail-end cap, to extending a matte-finish throughout the cover’s side rails, clamps, and elevator bolts. The MX4’s integrated buckle system and automatic latching mechanism allows you to drive with the cover partially or fully opened without covering the 3rd brake light. For 100% bed access, simply unlock the cover from either side via its pull latches and fold the cover all the way up against the cab. From there, you can prop the cover in place by tightening two rods into the underside of the panel. For enhanced durability, the MX4 also features pre-molded, shock-absorbent bumpers on either side of the panel, protecting the folded panels from hitting the cover during turbulent driving. Rain or shine, the MX4 provides confident cargo storage that’s complete with dual drain tubes to divert water away from the truck bed, as well as full perimeter seals to help protect against water intrusion

Review: Factory Fit, Premium Quality, and Exceptionally Well-Packaged - I recently installed a BAKFlip tonneau cover on my new Silverado High Country, and I couldn’t be more impressed. I was also really impressed with how well it was packaged — everything arrived protected, organized, and in perfect condition, which immediately gave me confidence in the product. The build quality is excellent — solid, well-engineered, and it fits the truck perfectly like it came from the factory. Installation was straightforward and took me less than an hour with basic tools. Everything lined up exactly as it should, and the instructions were clear. What I like most is how practical it makes the truck. Coming from an SUV, I was concerned about losing enclosed storage, but this cover completely solves that. It’s secure, keeps everything dry, and still gives me full access to the bed when I need it. It also looks great — low profile and clean, it really complements the High Country trim. Overall, this is one of the best upgrades I’ve made.
Review: SWEEEET! - Easy to install, took me well under an hour. Good quality, really sturdy with some very nice features. One of my favorites which makes this hard folding cover stand out is that it folds up to an upright position parallel with the rear cab window and comes with braces on both sides to hold it there. This allows you to utilize the entire bed of the truck when needed. A lot of the other versions of this type I saw didn't have this so when you folded it back you would lose the functionality of about a foot or so of bed space. You get a truck for when you have to move things, you don't want to fool around with limiting your available capacity when you need it most. This is easy to install, easy to use, improves the security for items in the bed of your truck and allows you to retain the use of more of your bed space when needed. I would definitely buy this again.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07GNHMVBM |
| Automotive Fit Type | Vehicle Specific Fit |
| Brand Name | RealTruck |
| Customer Reviews | 4.4 4.4 out of 5 stars (1,273) |
| Exterior Finish | Aluminum |
| Global Trade Identification Number | 00192631020486 |
| Included Components | Tonneau cover^rails^hardware^installation guide |
| Item Type Name | Tonneau Cover Tailgate truck bed |
| Item Weight | 71 Pounds |
| Lock Type | Tailgate |
| Manufacturer | BAK |
| Manufacturer Part Number | 448131 |
| Manufacturer Warranty Description | 2 |
| Material Type | Aluminum |
| Model Number | 448131 |
| Style Name | 2019 - 2022 New Body Style |
| UPC | 192631020486 |
| Unit Count | 1 Count |

## Product Details

- **Brand:** RealTruck
- **Exterior finish:** Aluminum
- **Lock type:** Tailgate
- **Material:** Aluminum
- **Style:** 2019 - 2022 New Body Style

## Images

![BAK BAKFlip MX4 Hard Folding Truck Bed Tonneau Cover | 448131 | Fits 2019-2023 Chevy/GMC Silverado/Sierra, works w/MultiPro/Flex tailgate 6' 7" Bed (79.4") - Image 1](https://m.media-amazon.com/images/I/61agUxl9a+L.jpg)

## Questions & Answers

**Q: Will this fit a 2015 crew cab silverado ?**
A: NO, Chevy/GM changed the dimensions in 2019 so this will not fit the 2015 Chevy.

**Q: Does this fit the new 2021 gmc at4 5'-8" bed**
A: Yes, this fits the 2019-2021 GMC Sierra 5'8 bed (Excluding Carbon Pro bed)

**Q: Will this fit my 2022 Silverado Crew Cab?**
A: It fit our 2500hd. We have a regular bed.

**Q: Works for a gmc sierra 1500 at4?**
A: I put one on a 2020 Sierra SLT Crew Cab with the short bed and it fits great. You have to know what cab size you have and what bed length you have.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Factory Fit, Premium Quality, and Exceptionally Well-Packaged
*by J***L on 21 March 2026*

I recently installed a BAKFlip tonneau cover on my new Silverado High Country, and I couldn’t be more impressed. I was also really impressed with how well it was packaged — everything arrived protected, organized, and in perfect condition, which immediately gave me confidence in the product. The build quality is excellent — solid, well-engineered, and it fits the truck perfectly like it came from the factory. Installation was straightforward and took me less than an hour with basic tools. Everything lined up exactly as it should, and the instructions were clear. What I like most is how practical it makes the truck. Coming from an SUV, I was concerned about losing enclosed storage, but this cover completely solves that. It’s secure, keeps everything dry, and still gives me full access to the bed when I need it. It also looks great — low profile and clean, it really complements the High Country trim. Overall, this is one of the best upgrades I’ve made.

### ⭐⭐⭐⭐⭐ SWEEEET!
*by D***. on 2 June 2019*

Easy to install, took me well under an hour. Good quality, really sturdy with some very nice features. One of my favorites which makes this hard folding cover stand out is that it folds up to an upright position parallel with the rear cab window and comes with braces on both sides to hold it there. This allows you to utilize the entire bed of the truck when needed. A lot of the other versions of this type I saw didn't have this so when you folded it back you would lose the functionality of about a foot or so of bed space. You get a truck for when you have to move things, you don't want to fool around with limiting your available capacity when you need it most. This is easy to install, easy to use, improves the security for items in the bed of your truck and allows you to retain the use of more of your bed space when needed. I would definitely buy this again.

### ⭐⭐⭐⭐⭐ Looks great!
*by G***Y on 14 April 2025*

Fits my 2021 GMC AT4 standard sized bed. No leaks, easy to install.

## Frequently Bought Together

- RealTruck BAK BAKFlip MX4 Hard Folding Truck Bed Tonneau Cover | 448131 | Fits 2019 - 2025 Chevy/GMC Silverado/Sierra, works w/ MultiPro/Flex tailgate 6' 7" Bed (79.4")
- ES ENGINEERED BY SCHILDMEIER Stake Pocket Covers for 2019 & Newer Silverado/Sierra (Set of 2) NOT 3D Printed

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**Shop now:** [https://www.desertcart.jp/products/437780949-bak-bakflip-mx4-hard-folding-truck-bed-tonneau-cover-448131](https://www.desertcart.jp/products/437780949-bak-bakflip-mx4-hard-folding-truck-bed-tonneau-cover-448131)

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-11-14*