--- product_id: 250722421 title: "RealTruck BAK BAKFlip MX4 Hard Folding Truck Bed Tonneau Cover | 448339 | Fits 2021-2026 Ford F-150 (incl. Raptor/Lightning) 5' 7\" Bed (67.1\")" brand: "realtruck" price: "$3991.46" currency: USD in_stock: true category: "Real Truck" url: https://www.desertcart.us/products/250722421-realtruck-bak-bakflip-mx4-hard-folding-truck-bed-tonneau-cover store_origin: US region: United States of America --- # Advanced weatherproof seals & clamps Patented auto-latch locking system 22% stronger aluminum-polymer build RealTruck BAK BAKFlip MX4 Hard Folding Truck Bed Tonneau Cover | 448339 | Fits 2021-2026 Ford F-150 (incl. Raptor/Lightning) 5' 7" Bed (67.1") **Brand:** realtruck **Price:** $3991.46 **Availability:** ✅ In Stock ## Summary > 🔧 Lock it. Weather it. Own the road with confidence. ## Quick Answers - **What is this?** RealTruck BAK BAKFlip MX4 Hard Folding Truck Bed Tonneau Cover | 448339 | Fits 2021-2026 Ford F-150 (incl. Raptor/Lightning) 5' 7" Bed (67.1") by realtruck - **How much does it cost?** $3991.46 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/250722421-realtruck-bak-bakflip-mx4-hard-folding-truck-bed-tonneau-cover) ## 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 for Extremes:** Tested from -40℉ to 180℉ with 95% humidity—durability that outlasts your toughest adventures. - • **Unmatched Security:** Patented auto-latch locks your gear with zero hassle—say goodbye to theft anxiety. - • **Seamless Bed Access:** 100% bed access anytime—fold it back effortlessly without blocking your third brake light. - • **Weatherproof Warrior:** State-of-the-art seals and clamps keep your bed dry from Alaska’s frost to Florida’s storms. - • **Sleek & Effortless Install:** Flush-mount matte finish with a click-in rail system cuts install time by 12%—style meets convenience. ## Overview The RealTruck BAKFlip MX4 Gen 3 is a premium hard folding truck bed cover designed specifically for 2021-2026 Ford F-150 5'7" beds. Featuring a patented auto-latch locking system, reinforced aluminum and polymer construction with 22% increased strength, and advanced weatherproof seals, it offers superior security, durability, and protection in extreme climates. Its sleek matte finish and quick-install design provide both style and convenience, backed by a 5-year warranty. ## 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. ## 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 | | Automotive Fit Type | Vehicle Specific Fit | | Best Sellers Rank | #7,969 in Automotive ( See Top 100 in Automotive ) #17 in Truck Tonneau Covers | | Brand Name | RealTruck | | Customer Reviews | 4.3 4.3 out of 5 stars (721) | | Exterior Finish | Matte Aluminum | | Global Trade Identification Number | 00192631033097 | | Included Components | tonneau cover | hardware kit | install guide | | Item Type Name | truck bed tonneau cover | | Lock Type | Tailgate | | Manufacturer | BAK Industries | | Manufacturer Part Number | 448339 | | Manufacturer Warranty Description | Extended 5-Year | | Material Type | Aluminum | | Model Number | 448339 | | OEM Equivalent Part Number | 448339 | | Style Name | BAKFlip MX4 | | UPC | 192631033097 | | Unit Count | 1.0 Count | | Weight Capacity Maximum | 54.9 Pounds | ## Product Details - **Brand:** RealTruck - **Exterior Finish:** Matte Aluminum - **Lock Type:** Tailgate - **Material:** Aluminum - **Style:** BAKFlip MX4 ## Images ![RealTruck BAK BAKFlip MX4 Hard Folding Truck Bed Tonneau Cover | 448339 | Fits 2021-2026 Ford F-150 (incl. Raptor/Lightning) 5' 7" Bed (67.1") - Image 1](https://m.media-amazon.com/images/I/61Q0aozyebL.jpg) ## Available Options This product comes in different **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. ## 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") - RYDONAIR Short Antenna Compatible with Ford F150 2009-2025 & Ford Bronco 2021-2025, Internal Copper Coil for Enhanced Reception, Car Wash Proof, 7 inches Rubber Antenna Replacement - Bedrug Classic Bed Liner | Fits 2015 - 2024 Ford F-150 5'7" Bed (BRZSPRAYON is required if installing over Spray-In Liner), Charcoal Grey | BRQ15SCK --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.us/products/250722421-realtruck-bak-bakflip-mx4-hard-folding-truck-bed-tonneau-cover](https://www.desertcart.us/products/250722421-realtruck-bak-bakflip-mx4-hard-folding-truck-bed-tonneau-cover) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-07-14*