Gull Wing Truck Cap Topper & Overland Camper Shell for Work, Camping & Off-Road | Dirtbox Overland
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Upgrade your truck with the Dirtbox Overland Truck Bed Topper — a rugged, lightweight, and modular system built for both overlanding and professional use.
Designed, fabricated, and tested entirely in-house, this topper combines T6 extruded aluminum construction, precision welding, and clean design to deliver unmatched performance on and off the road.
Engineered for Strength
Each unit is fully TIG- and laser-welded for maximum rigidity and long-term reliability. From job sites to backcountry trails, it’s built to handle the harshest environments while keeping your gear protected wherever you go.
Lightweight & Efficient Design
Weighing only 150–250 lbs (depending on bed length), the topper keeps your truck agile without sacrificing strength. Its low-profile design improves aerodynamics and complements modern truck lines, while the simple mounting system makes installation and removal quick and easy.
Versatile Roof Mounting System
Dual roof-mounted L-Tracks are built directly into the structure, giving you unlimited flexibility to mount solar panels, ladder racks, kayaks, skis, tie-downs, or recovery gear. Whether you’re working in the field or exploring remote trails, your setup adapts to every mission.
Built-In Power & Lighting
Every topper comes pre-wired and plug-and-play, featuring dimmable LED interior lighting, a 12 V outlet, and USB-A / USB-C ports to power tools and devices on the go.
Many owners upgrade with the Kingpin Light Package, adding illumination under the bed platform and at the rear door for better visibility during late-night setups or job-site work.
Visibility & Access
Standard front and rear windows provide natural light and visibility, while the front sliding pass-through windowallows cab-to-camper airflow.
Dual extruded-aluminum gullwing doors with recessed frames and deep automotive-grade seals block out dust and water even in the roughest conditions.
At the front panel, a dedicated weather seal prevents wind or debris from entering the cab-facing side — keeping the interior clean and secure.
Designed for Real Use
Built for both work and play — load your tools, mount recovery gear, or kick back on your tailgate for a sunrise.
Like every Dirtbox product, the topper is made for multi-use functionality, letting you enjoy your truck as a truck while unlocking its full overland potential.
Extreme-Condition Tested
Proven across Colorado’s toughest environments — from high-altitude snow to desert heat — the topper maintains insulation, sealing, and corrosion resistance year-round.
We’ve cold-tested it down to –46°F in Tuktuyaktuk, Northwest Territories, and heat-tested it in 135°F at Anza-Borrego Desert.
For extreme climates, we recommend pairing it with our LF Bro Diesel Heater setup (using a custom Dirtbox-fabricated mount) or portable A/C systems such as Cybertake or Zero Breeze for stable comfort anywhere.
Specifications
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Material: T6 Extruded Aluminum (Fully TIG- & Laser-Welded)
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Weight: 150–250 lbs (varies by bed length)
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Finish: Durable Powder Coat
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Mounting: No Drilling Required — Custom Dirtbox Mounting Brackets
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Lighting & Power: Dimmable LEDs, 12 V + USB-A/USB-C Ports
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Windows: Front Sliding Pass-Through & Rear Tempered Glass
🚀 Now Available: Silverado EV Topper
The Dirtbox Silverado EV Topper is officially live and open for pre-order.
Engineered with the same strength, modularity, and precision craftsmanship as our flagship models, it’s purpose-built for the next generation of electric adventure.
A midgate pass-through design is available — allowing direct access from the truck bed to the cab, creating a connected, enclosed interior space perfect for extended travel, storage, or sleeping setups.
Precision-Built. Trail-Tested.
T6 extruded aluminum, TIG- and laser-welded for maximum strength and precision. Corrosion-resistant and built to endure harsh environments, it strikes the perfect balance between lightweight efficiency and Dirtbox durability — engineered to outlast your truck.
Power Built In
Pre-wired and plug-and-play with four precision LEDs on both gullwing doors, a full-length rear light, and integrated switch control. A 12V outlet with USB-A and USB-C ports keeps every adventure effortlessly powered.
All-Purpose Roof Mounting Platform
Two full-length L-Tracks are seamlessly integrated into the roof extrusion, creating a secure platform for tie-downs, solar panels, ski and kayak racks, bicycle mounts, or professional ladder systems. Designed to transition effortlessly from the jobsite to the trail.
Side-Mounted Modularity
Integrated L-Tracks along both sides of the topper let you mount fuel or water tanks, recovery tools, shovels, snowboards, or even a side-mounted bike rack. Built to stay clear of the ground and protect your departure angle, this system turns every panel into functional, trail-ready storage.
Visibility and Ventilation, Refined
Designed for clarity, comfort, and safety. The front sliding window features a center pass-through section that allows active airflow between cab and camper — keeping pets comfortable and air circulating while driving or camping. A rear tempered-glass window adds strength and definition, while dual marker lights and an integrated third brake light ensure visibility in every condition.
Adaptive Interior Mounting System
A full T-Track system spans both gullwing doors and the interior, giving you complete flexibility to mount your setup anywhere you need it. Add tie-down points for utility gear, mount water tanks on either side, or attach accessories like fire extinguishers, diesel heater brackets, and third-party equipment — all with strength and precision built in.
Modular Strength, Built In
The side gullwing doors are constructed from rugged extruded aluminum — not thin sheet panels — providing the strength to mount heavier recovery gear and handle daily use without flex. Each topper is compatible with modular accessories such as interior side MOLLE boxes, 270° awnings, and more. On larger 8-ft trucks, dual side MOLLE boxes offer even greater storage and versatility for work or adventure.
Modularity That Works for You
Designed to adapt to your lifestyle, the Dirtbox topper’s modular roof system lets you build exactly what you need. Add a 270° awning for shade, mount a crossbar for recovery gear or hard cases, or install a cell-signal booster and Starlink for reliable connectivity off the grid. Every setup is customizable, practical, and built to keep you prepared wherever you go.
Ordering & Lead Time
What’s the current lead time?
Lead time is typically 1–2 weeks after your order is confirmed, depending on your truck model and configuration. Once your topper is ready, our team will reach out to schedule installation or ship it out to you.
Do you ship internationally?
Yes — we ship both domestically and internationally. For a freight quote, please contact us with your ZIP or postal code.
What is the process for me to receive my topper?
Once your order and deposit are confirmed, our team will double-check your truck details to make sure everything fits perfectly. When your topper is ready, we’ll reach out toschedule your installation at our Denver facility or arrange shipping.
All toppers ship directly from Denver, and most customers receive theirs within 2–4 days — whether that’s to your preferred shop or your home. Just a quick heads-up: some neighborhoods with strict HOA rulesmay not allow large freight trucks, so in that case, we’ll help you coordinate delivery to a nearby shop or freight terminal instead.
Installation & Compatibility
What trucks or trailers does it fit?
We offer fitment for most mid- and full-size trucks, including Tacoma, Tundra, F-150, Super Duty, Silverado, Colorado, Ram, and more.
If your vehicle isn’t on that list, don’t worry — we can custom-build toppers for specialty applications such as fire trucks, first responder units, and expedition trailers. We also work closely with XVenture Trailer and other trailer manufacturers to design and fabricate custom topper systems that match your specific setup.
If you’re interested in a custom build, just reach out to our team and we’ll send over a dimension form to get the process started.
Can I still use my tailgate?
Yes — the topper integrates seamlessly with your factory tailgate, maintaining full functionality and weather sealing. The Dirtbox concept is all about keeping your truck a truck— built for both work and play. You can still sit on your tailgate with your partner to catch a sunrise, load up gear for a job, or set up camp for the night.
With our new duckbill rear design, you can choose to open your tailgate first or your topper rear door first— giving you full flexibility in how you use your setup.
Do I need to modify my truck bed?
No — the topper is lightweight and designed to fit most truck and trailer payloads on the market without modification. It installs using our custom Dirtbox mounting brackets, with no drilling required.
For most setups, installation is straightforward and ready to go. However, if you’re a construction company hauling heavy equipment or a full-time overlander running a high-weight setup, you may want to upgrade your rear suspension for extra support and balance.
Can I install it myself?
Yes — you can definitely install your topper yourself if you’ve got some basic tools and a bit of hands-on experience. The process usually takes about 1–2 hours, not including any accessories.
That said, we recommend having it installed at a shop or one of our dealer locations, since they have the right equipment — like a gantry or crane— to lift and position the topper safely. It’s the easiest and safest way to make sure everything lines up perfectly.
Can I still access my bed power outlets or tie-down points?
Yes — the topper design keeps factory tie-downs and bed outlets accessible, so you can still use your truck bed like normal.
Will the topper work with bed liners, bed rugs, or tonneau covers?
The topper mounts directly to the bed rails, so spray-in or drop-in liners are fine, but tonneau covers will need to be removed before installation.
Will the topper affect my truck’s fuel economy or ride height?
Not really — the topper’s lightweight construction and aerodynamic profile help minimize drag and maintain a balanced ride. We’ve tested it bothon-road and off-road, and haven’t seen any noticeable changes in fuel efficiency or handling.
Structure, Materials & Durability
What is the Dirtbox Overland Topper made of?
Each topper is built from T6 extruded aluminum, fully TIG- and laser-welded for maximum strength and precision. It’s engineered for off-road performance and long-term durability.
Is it rust-proof?
Yes. The topper is corrosion-resistant and weather-sealed, using aluminum and stainless hardware that won’t rust — even through snow, salt, or moisture.
How does it handle extreme weather?
Tested across Colorado’s toughest environments — from high-altitude snow to desert heat— the topper maintains insulation, sealing, and corrosion resistance year-round.
We’ve cold-tested it down to–46°F in Tuktuyaktuk, Northwest Territories, proving its reliability in Arctic conditions. For extreme cold, we recommend pairing it with our LF Bro Diesel Heater setup, featuring a custom Dirtbox-fabricated heater mount for seamless integration.
In extreme heat testing at 135°F in Anza-Borrego Desert, we paired the topper with portable A/C systems like Cybertake and Zero Breeze, confirming stable performance and interior comfort even under the harshest sun.
Is the topper fully waterproof and dustproof?
Yes — every Dirtbox topper is built for complete protection against dust, water, and debris. The rear duckbill design helps deflect rain and road dust, keeping the interior clean and dry.
Both side gull-wing doors feature a recessed frame and a thick, automotive-grade weather seal that runs the full perimeter, preventing any dust or water intrusion even in harsh conditions.
At the front panel, we’ve also added a dedicated seal to block wind and fine dust from entering through the cab-facing side — ensuring full protection from every direction.
Power & Connectivity
Can I charge my devices inside the topper?
Absolutely. Every Dirtbox topper includes a 12V outlet and USB-A / USB-C ports, so you can power or charge your phones, cameras, drones, tablets, and tools with ease.
All outlets are weather-protected and fused, designed for both everyday and expedition use. Whether you’re camping off-grid or working overnight at a site, you’ll always have a reliable power source at arm’s reach.
Can I run Starlink, solar power, or a cell booster?
Yes — the topper is designed with connectivity and self-sufficiency in mind. Using our roof crossbars and L-Track mounting system, you can easily mount a Starlink satellite dish, cell-signal booster, or solar panels to stay connected anywhere.
Many Dirtbox owners pair the setup with portable batteries or onboard power stations for full off-grid independence.
Can I add more lights later?
Yes — the electrical system is pre-wired and expandable, so you can easily add additional lighting wherever you need it. Many customers choose to upgrade with the Kingpin light package, which includes one light mounted underneath the bed platform and another at the rear door for better visibility when camping or loading gear at night.
