On-Board Air and Aux Battery
If you’re looking to maximize the storage and securely mount a dual ARB compressor and auxiliary battery, take a look at our Jeep Wrangler JKU Cargo Compressor Mount.
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Jeep Wrangler JKU MASS Plus Storage Platform
Fitment: Jeep Wrangler JKU - 4-Door
Price range: $565.96 through $735.96
JKU MASS+ is a structural cargo platform for the 4-door Jeep Wrangler JKU, built with aluminum top panels and a steel substructure. Massive tie-down density, access doors to the cubby below the floor, and fitment options for OEM side wall subwoofer or floor/no subwoofer. Also available with keyed compression latches or bolt-in doors.
Note: Product photos may contain optional components.
Jeep Wrangler JKU MASS+ Platform
The JKU MASS+ Platform is the next step in cargo management for the 4-door Jeep Wrangler JKU: a structural, modular platform engineered to support real overland loads while giving you an insane number of tie-down and attachment points. If you want a foundation for drawers, fridge slides, cargo boxes, auxiliary batteries, tools, recovery gear, dog crates, or just a clean way to keep everything locked down, MASS+ is built for that job.
This platform uses aluminum top panels for weight savings and corrosion resistance, paired with a steel substructure for strength and long-term durability. It is designed and manufactured to be the backbone of a build that evolves over time.
This is the JKU version of our proven JLU MASS+ platform concept, adapted specifically to the JKU cargo area and subwoofer variations.
Structural Platform
Engineered to support drawers, fridge slides, cargo boxes, and power systems.
Huge Mounting Density
Tie-down and threaded mounting points let you strap, bolt, and reconfigure gear cleanly.
Cubby Access Doors
Reach the storage and service area below the floor without unloading your rig.
MASS vs MASS+ (What’s the Difference?)
MASS+ is not just a different panel. It is a structural platform and access system designed to expand what the rear cargo area can do.
MASS
- A modular platform designed to mount and organize gear using a standardized bolt pattern
- This version uses the dogbone-shaped cutouts for attaching L-track connectors
MASS+
- Adds a reinforced structural architecture and threaded mounting hole pattern
- Includes service access that unlocks real-world usability with drawers and stacked modules
- This version does not use the dogbone-shaped cutouts
The big difference: MASS+ includes access to the cubby storage and service areas beneath the floor. That matters when you are running drawers and gear on top and still need to reach equipment, storage, or components below.
Structural Platform Built for Real Loads
MASS+ is engineered as a structural platform designed to support drawers, fridge slides, cargo boxes, and power systems without needing a bunch of improvised supports. It is a true foundation for modular storage and overland equipment, not just a flat panel that happens to sit in the back.
The aluminum top panels keep weight down and resist corrosion. The steel substructure provides the rigidity needed for heavy modular loads and long-term reliability in harsh environments.
More Tie-Downs. More Mounting Options. More Control.
If you value a clean and secure way to mount gear, MASS+ is a cheat code. The platform is designed with extensive mounting points so you can strap, bolt, and position gear exactly where you want it. This is a massive benefit even if you never install drawers.
Clean tie-down zones for tools, parts, and recovery gear.
Consistent alignment for mounting cargo boxes, fridge slides, and stacked modules.
Secure dog crates and soft goods without sketchy anchors.
Reconfigure anytime as your needs change.
Ultimate Cargo Solution
If you’re in the situation where storage is preferred over rear-seat passengers, we have the solution for you. When you pair this MASS+ system with our new Jeep Wrangler JKU Rear Seat Delete, you create a massive, single plane, storage platform. This is great for sleeping inside the vehicle, carrying long items, and mounting your gear.
Jeep Wrangler JKU Seat DeleteAccess Doors: Serviceability Without Unloading Your Rig
MASS+ includes access doors that provide direct access to the cubby area below the floor. This means you can reach storage or components below without removing the entire platform or unloading your gear. It is one of the most useful real-world upgrades for expedition travel and daily use.
Keyed Toggle Compression Latches
Best for frequent access and fast serviceability. Tool-less entry with secure, rattle-resistant preload.
- Fast entry to the cubby below
- Secure and rattle resistant
- Great for expedition use
Bolt-In Doors
Best when clearance below drawers is critical, such as when packaging auxiliary batteries or other under-platform systems.
- Lowest profile solution
- Maximum under-drawer clearance
- Extremely secure
Already Have MASS? Upgrade Instead of Starting Over.
If you already own a JKU MASS platform, you do not have to rebuy everything to step up to MASS+. We offer a MASS+ Upgrade Kit that includes the updated panels, access doors, and required nut plates to convert your existing platform to a MASS+ configuration.
Choose Your Subwoofer Configuration
The JKU MASS+ Platform is offered in two primary fitment variations to match your factory subwoofer layout. The passenger-side panels are properly clearanced based on the configuration you select.
OEM Side Wall Subwoofer
Designed to fit JKUs equipped with the factory side-mounted subwoofer.
Floor Subwoofer or No Subwoofer
Designed for JKUs with the floor subwoofer configuration, or builds without a subwoofer.
Materials and Finish Options
Construction
- Top Panels: Aluminum for weight savings and corrosion resistance
- Substructure: Steel for strength and long-term rigidity
Finish Options
- Raw / unfinished
- Textured black powder coat (varies by selection)
- Mil-Spec™ Liner (polyurea spray liner)
Fitment
- Vehicle: Jeep Wrangler JKU (4-door)
- Model Years: All JKU model years (verify configuration selection for subwoofer fitment)
- Subwoofer Variations: OEM side wall subwoofer, or floor subwoofer / no subwoofer
Built In-House
Designed and manufactured by American Adventure Lab in our facility in St. George, Utah. Built for hard use, long trips, and a cargo system that you can keep improving for years.
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