18″ Big Mouth Step Box

CAD

Available to Order

18" wide model.
Multiple finish options.
50% Larger opening than traditional step boxes allows you to store more tools, more easily.
Enables the use of unused and hard-to-use frame space.
Adds useful additional storage.
Strong, lightweight aluminum construction.
High-quality automotive bulb seal for water resistance.
Step tread increases safety by reducing the possibility of slipping.

The 18" Big Mouth Step Box sits right between compact and full-size. It’s the go-to choice for drivers who need that “just right” fit, throw in some extra gear and hit the road. With the Big Mouth lid design, you get a 50% larger opening that provides easier access, so you’re not wasting time digging through a small opening. It’s built from lightweight yet strong ⅛" thick marine-grade aluminum that can take a beating and sealed tight with an automotive-grade bulb seal to keep your tools dry and ready to go. The treaded step adds grip when climbing, and the lid comes in smooth or checkerplate to match your style. If you want more storage without eating up a ton of space, the 18" Big Mouth is a no-brainer.

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Specs: Part #N/A

- Width

- Height

- Depth

- Weight

50% Larger Opening

Find, store, and access your equipment more quickly and easily with the Big Mouth’s 50% larger door opening.

High-Grip Step Tread

High-grip step tread looks OEM and increases safety by reducing the chance of slipping.

7 Sizes & 3 Finishes

Offered in 7 standard widths and 3 standard finishes, there’s a Big Mouth Step box for every truck.

An Iconic Innovation

Big Mouth Step Box Features

After identifying key design flaws with traditional step boxes, we completely reimagined them. Introducing the original 'Big Mouth' step box. A design you’ll recognize, without the headaches.

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FREQUENTLY ASKED QUESTIONS

Find quick answers to the most common questions we receive. If you're still unsure, feel free to reach out to our support team.

Big Mouth Step Boxes are to be mounted with Iconic’s 24” Steel L-Mounting Bracket Set (PN 1900). The brackets include a variety of pre-drilled holes, and the brackets come powder coated in a black finish.

Yes. Iconic offers Big Mouth Step Boxes, both with a smooth or checkerplate lid, in the following widths: 12”, 16”, 18”, 22”, 24”, 30”, and 36”. Custom sizing can be requested but will have a lead time. We stock many different standard sizes.

No. The Big Mouth Step Box is manufactured in such a way that no bracket or shock is required to hold the door open. The door is manufactured to sit open on its own while still being able to clear a deck plate or frame rail.