International LoneStar Deck Plates-Air Line Box

Frequently Asked Questions About International LoneStar Deck Plates-Air Line Box

What is a deck plate air line box and what does it do?

The deck plate air line box is the panel located on the back of the cab or on the frame deck of your International LoneStar that houses and protects the air lines and electrical connections running between the tractor and trailer. It also typically doubles as a step or walking surface, so it needs to be both durable and slip resistant.

Will this deck plate fit my LoneStar without modification?

Deck plates and air line boxes are built to match the factory mounting points and dimensions for the International LoneStar, so in most cases they bolt on using the existing holes and hardware. That said, production years can bring small changes to hole spacing or panel shape, so it is a good idea to compare the measurements and bolt pattern of the listed part to your truck, or check with our team before ordering, especially if your truck has had prior body work.

What material and finish options are available?

These panels are commonly offered in diamond plate aluminum or stainless steel. Aluminum is lighter and resists corrosion well, while stainless steel offers extra strength and a brighter, mirror-like or brushed finish for drivers who want a more polished look. Both options are treated to hold up against road grime, moisture, and the wear that comes from foot traffic.

How difficult is it to install a replacement deck plate or air line box?

Installation is generally straightforward for anyone comfortable with basic hand tools. The old unit is unbolted from the frame or cab mount, air lines and wiring are disconnected and rerouted through the new box, and the replacement is bolted back into place using the factory hardware or the hardware included with the part. Because the box holds active air and electrical lines, it is important to support the lines properly during removal and reinstallation so nothing gets kinked, pinched, or disconnected.

Why replace this part instead of just repairing the old one?

Deck plates and air line boxes take a lot of abuse from foot traffic, road debris, and exposure to weather, which can lead to cracked welds, rust-through, or a diamond plate surface that is no longer slip resistant. Once the structure is compromised, it can no longer properly support the air lines or provide a safe stepping surface, so a full replacement is usually more reliable than a patch repair and helps you avoid safety issues or DOT inspection concerns down the road.