---
product_id: 363212150
title: "BAK BAKFlip MX4 Hard Folding Truck Bed Tonneau Cover | 448339 | Fits 2021 Ford F-150 5' 7\" Bed (67.1\")"
brand: "realtruck"
price: "$8970"
currency: NZD
in_stock: true
reviews_count: 5
category: "Real Truck"
url: https://www.desertcart.nz/products/363212150-bak-bakflip-mx4-hard-folding-truck-bed-tonneau-cover-448339
store_origin: NZ
region: New Zealand
---

# Advanced weatherproof seals & clamps Patented auto-latch locking system 22% stronger alloy-based construction BAK BAKFlip MX4 Hard Folding Truck Bed Tonneau Cover | 448339 | Fits 2021 Ford F-150 5' 7" Bed (67.1")

**Brand:** realtruck
**Price:** $8970
**Availability:** ✅ In Stock

## Summary

> 🚛 Lock it. Weather it. Own the road with BAKFlip MX4.

## Quick Answers

- **What is this?** BAK BAKFlip MX4 Hard Folding Truck Bed Tonneau Cover | 448339 | Fits 2021 Ford F-150 5' 7" Bed (67.1") by realtruck
- **How much does it cost?** $8970 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/products/363212150-bak-bakflip-mx4-hard-folding-truck-bed-tonneau-cover-448339)

## 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

- • **Built to Endure:** 22% stronger aluminum panels reinforced with polymer cores for daily toughness and heavy loads.
- • **Unmatched Security:** Patented auto-latch locks your gear with zero hassle—thieves don’t stand a chance.
- • **Seamless Bed Access:** Fold it back fully without blocking your brake light—100% bed access anytime, anywhere.
- • **Weatherproof Warrior:** State-of-the-art seals and clamps keep your truck bed dry from Alaska’s frost to Florida’s storms.
- • **Effortless Installation:** Click-in rail system cuts install time by 12%—get back on the road faster and smarter.

## Overview

The BAKFlip MX4 Gen 3 is the world’s best-selling hard folding truck bed cover, engineered for 2021-2026 Ford F-150 5'7" beds. Featuring a patented auto-latch locking system, reinforced alloy construction with polymer cores, and advanced weatherproof seals, it delivers 22% more strength and superior theft resistance. Tested in extreme climates from -40 to 180℉, it offers full bed access with a sleek, matte-black flush-mount design. Installation is streamlined with a click-in rail system, backed by a 5-year warranty for lasting confidence.

## Description

Product Description America’s best-selling truck bed cover just got even better.Introducing the BAKFlip MX4 Gen 3—the latest evolution of RealTruck’s most popular tonneau cover. Now better than ever, the BAK has redesigned the for improved strength, security, and all-weather performance. The Gen 3 MX4 features alloy-based construction, including heavy-duty aluminum side rails and top panels, reinforced with high-density polymer cores. This updated design delivers a 22 percent increase in strength over the previous generation, making it even more capable of handling daily use, heavy loads, and harsh environments. Security has also been upgraded. BAK’s patented auto-latching system secures the cover automatically when closed. Newly engineered lock components provide added resistance to tampering and forced entry, allowing you to transport your gear with confidence. In rough weather, the Gen 3 MX4 holds strong. Revised EPDM perimeter seals and tight-fit clamps offer the best seal yet, helping prevent water intrusion along the bed rails. A longer dual-action tailgate seal weatherproofs the tailgate while preserving full functionality, whether the cover is open or closed. While the MX4 is built tough, it doesn’t compromise on looks. The flush-mount design gives it a sleek, low-profile appearance, while a textured matte-black finish across all surfaces delivers a clean, subtle aesthetic. Installation is easier than ever with a new click-in rail system that cuts install time by up to 12 percent. Day-to-day use is just as simple—drop the tailgate, unlatch, and fold the cover forward. For complete bed access, fold the cover against the cab without blocking your third brake light. The BAKFlip MX4 Gen 3 is proudly assembled in Missouri using globally sourced materials and backed by a 5-year warranty. Safety Warning California Residents

Review: Upgraded from the factory Ford trifold. This top is perfect. Fits excellent. Automatic tailgate opens and closes as it should with no interference. Had a major storm yesterday and the box was completely dry except for some water on the tail gate, which I expected. There is a small clearance at the tailgate to allow for the automatic tailgate release. You could adjust it closer if you need. I'm very satisfied. Looks so much better too.
Review: This is my second BAKFlip hard cover. Had one on my GMC which was destroyed by a falling tree during a tornado passage. After replacing the vehicle I purchased this one from desertcart and installed myself on my new Ford. This one is better and lighter than the original model. Fairly water resistant, but water from a driving rain creeps in from the tailgate area and a little on the sides. If you are carrying something than should not get wet you might consider keeping a trap as extra protection as I do. The best thing about any type of cover for your truck bed, is that once the bed is covered whatever is under the cover is out of sight and out mind. So those tempted to "take what they see" is avoided. The advantage of a sectional hard cover vs a solid or soft cover is the ability to access the full bed easily and lock it closed when the tail gate is up. This cover I found easy to install by myself in about an 1.5 hours. Watch a video, once you figure out how to mount the rails and where to run the water drain tubes it is very easy. My other cover was on my GMC for 10 years and it held up so I am expecting this one to perform similarly.

## Features

- Fits 2021 - 2026 Ford F-150 (incl. Raptor/Lightning) 5' 7" Bed (67.1")
- THE BEST-SELLING TRUCK BED COVER IN THE WORLD JUST GOT BETTER
- NOW EVEN MORE SECURE THAN GEN 2 | The new BAKFlip MX4 comes with an updated design tested to keep your gear on theft-resistant lockdown with a patented and upgraded auto-latch locking system.
- FITS TIGHTER TO KEEP WATER OUT | Improved seals and all-new tight-fit clamps provide state-of-the-art weather protection.
- PROVEN FOR EXTREMES FROM ALASKA TO FLORIDA | Tested in the harshest conditions—from -40 to 180℉ and zero to 95% humidity—and guaranteed by a 5-year warranty.
- NO WASTED BED SPACE, PARKED OR DRIVING | 100% bed access. All the time. Simply fold to the cab, easily secure, and safely drive with the cover fully open.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08L44X6NZ |
| Brand | RealTruck |
| Customer Reviews | 4.3 4.3 out of 5 stars (575) |
| Date First Available | 12 Oct. 2020 |
| Exterior | Matte Aluminum |
| Item Weight | 24.9 kg |
| Item model number | 448339 |
| Manufacturer | BAK Industries |
| Manufacturer part number | 448339 |
| Model | BAKFlip MX4 |
| Product Dimensions | 175.51 x 58.93 x 18.8 cm; 24.95 kg |

## Product Details

- **Brand:** RealTruck
- **Exterior finish:** Matte Aluminum
- **Lock type:** Tailgate
- **Material:** Aluminium
- **Style:** BAKFlip MX4

## Images

![BAK BAKFlip MX4 Hard Folding Truck Bed Tonneau Cover | 448339 | Fits 2021 Ford F-150 5' 7" Bed (67.1") - Image 1](https://m.media-amazon.com/images/I/61mpK93Qg0L.jpg)

## Available Options

This product comes in different **Color, Size, Style** options.

## Questions & Answers

**Q: Does it fit a chevy truck? All I see is ford**
A: The BAK BAKFlip MX4 Hard Folding Truck Bed Tonneau Cover you mentioned, with part number 448339, is specifically listed as fitting the 2021 - 2023 Ford F-150 models with a 5' 7" bed.

Based on the information provided, it appears that this particular tonneau cover is designed and intended for Ford F-150 trucks, and there is no indication of it being compatible with Chevy trucks.

If you are looking for a tonneau cover for your Chevy truck, I would recommend looking for options specifically designed to fit your Chevy model and bed size. It's important to ensure that the tonneau cover you choose is compatible with the specific make, model, and bed size of your truck to ensure proper fitment and functionality.

**Q: where is the part number located.? I don’t see no white sticker on bottom and no box**
A: I can't help you.  I got a Bak Flip G2.

**Q: How durable is the MX4? Read many reviews of this tonneau cover denting easily.**
A: Its as tough as they come. I've had my 4 year old nephew standing on it and no flex at all. Plus its so easy to install and operate, hell my wife finds it easy to use. Its made with top notch materials and looks great on the truck. I had friends see mine and bought one just from sight. we love ours and have no issues with it at all. 
Its a solid buy!!

**Q: Will this fit a 2023 f150**
A: With a New Model Year F-150 it would be best to contact the manufacturer directly. Although they do reference it fitting 2021-2023. Mine is an Older Model and it fit correctly.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by S***X on 16 August 2023*

Upgraded from the factory Ford trifold. This top is perfect. Fits excellent. Automatic tailgate opens and closes as it should with no interference. Had a major storm yesterday and the box was completely dry except for some water on the tail gate, which I expected. There is a small clearance at the tailgate to allow for the automatic tailgate release. You could adjust it closer if you need. I'm very satisfied. Looks so much better too.

### ⭐⭐⭐⭐⭐ Review
*by P***Y on 30 October 2025*

This is my second BAKFlip hard cover. Had one on my GMC which was destroyed by a falling tree during a tornado passage. After replacing the vehicle I purchased this one from Amazon and installed myself on my new Ford. This one is better and lighter than the original model. Fairly water resistant, but water from a driving rain creeps in from the tailgate area and a little on the sides. If you are carrying something than should not get wet you might consider keeping a trap as extra protection as I do. The best thing about any type of cover for your truck bed, is that once the bed is covered whatever is under the cover is out of sight and out mind. So those tempted to "take what they see" is avoided. The advantage of a sectional hard cover vs a solid or soft cover is the ability to access the full bed easily and lock it closed when the tail gate is up. This cover I found easy to install by myself in about an 1.5 hours. Watch a video, once you figure out how to mount the rails and where to run the water drain tubes it is very easy. My other cover was on my GMC for 10 years and it held up so I am expecting this one to perform similarly.

### ⭐⭐⭐⭐⭐ Review
*by T***M on 14 June 2023*

Quick delivery, well packaged, no missing parts. Easy install. Looks great. Was deciding between the X4s and the M4 but I like that the M4 can be partially open. The X4s is either fully closed or fully opened. Very satisfied.

## Frequently Bought Together

- RealTruck BAK BAKFlip MX4 Hard Folding Truck Bed Tonneau Cover | 448339 | Fits 2021-2025 Ford F-150 (incl. Raptor/Lightning) 5' 7" Bed (67.1")
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*Product available on Desertcart New Zealand*
*Store origin: NZ*
*Last updated: 2026-02-19*