Kenworth T660 Deck Plates & Air Line Boxes

Frequently Asked Questions About Kenworth T660 Deck Plates & Air Line Boxes

What are deck plates and air line boxes used for on a Kenworth T660?

Deck plates are the flat metal panels mounted behind the cab, on top of the frame rails, that provide a durable working surface and connection point for hoses, electrical lines, and air lines running to the trailer. Air line boxes are the enclosures mounted on or near the deck plate that house and protect the glad hands, electrical connectors, and air line fittings from road debris, moisture, and physical damage. Together these components keep your air and electrical connections organized, protected, and easy to access.

Will a replacement deck plate or air line box fit my T660 without modification?

Most deck plates and air line boxes sold for the T660 are designed to bolt into the factory mounting locations behind the cab, but fitment can vary depending on the model year, frame width, and whether your truck has any aftermarket modifications already in place. Always check listed dimensions and mounting hole patterns against your existing setup before ordering, and reach out to our team if you are unsure about compatibility.

What materials are these parts made from, and how do they hold up over time?

Deck plates and air line boxes are typically made from aluminum, stainless steel, or steel with a protective coating or finish. Aluminum options are lighter and resist corrosion well, while stainless steel offers a polished look and strong durability against road salt and weather exposure. The right choice depends on your priorities around weight, appearance, and long-term maintenance in your operating environment.

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

Installation generally involves removing the old unit, disconnecting air lines and electrical connectors, and bolting the new component into place using the existing mounting holes. Most owners with basic mechanical experience and common hand tools can complete the swap in a shop setting. If your lines or fittings need to be rerouted or if the new part does not match the original hole pattern, additional time and drilling may be required.

Can I upgrade to a different style or finish for appearance purposes?

Yes, many truckers choose to upgrade their factory deck plate or air line box to a diamond plate, polished stainless, or custom-styled version to match the rest of their truck's chrome or aluminum accessories. As long as the replacement part maintains proper mounting and secure protection for your air and electrical lines, upgrading for looks is a common and practical choice.