Peterbilt 379 Air Tanks, Wraps & Mounting

Frequently Asked Questions About Peterbilt 379 Air Tanks, Wraps & Mounting

Will an air tank or wrap designed for the Peterbilt 379 fit my truck without modification?

Most air tanks, tank wraps, and mounting brackets in this category are built to match the factory dimensions and bolt patterns used on the Peterbilt 379. That said, air tank placement and mounting configurations can vary depending on the year of your truck and how it was originally set up from the factory or by a previous owner. We recommend comparing measurements and mounting hole spacing against your existing setup before ordering to avoid fitment surprises.

What is an air tank wrap, and do I need one?

An air tank wrap is a decorative cover, typically made of stainless steel or aluminum, that fits around the exterior of your air tank to dress up an otherwise plain, utilitarian component. Wraps are purely cosmetic and do not affect the function of the air tank itself. They are popular with owner-operators looking to add a polished, finished look to their frame rails and undercarriage.

What materials are these air tanks and wraps made from, and how do they hold up?

Air tanks are typically constructed from steel to handle the pressure and demands of your truck's air brake and air suspension systems. Wraps and mounting components are commonly offered in stainless steel or polished aluminum. Stainless steel wraps generally offer better long-term corrosion resistance, especially in areas with road salt or heavy moisture exposure, while polished aluminum offers a lighter-weight option with a bright finish that may require more frequent polishing to maintain its shine.

What tools and steps are involved in installing an air tank or wrap?

Installing a replacement air tank involves properly draining and disconnecting the existing air lines, unbolting the old tank from its mounting brackets, and transferring or replacing hardware as needed before installing the new tank and reconnecting air lines securely. Wraps are simpler, generally installing around the existing tank with clamps, screws, or adhesive backing depending on the product design. Basic hand tools are typically sufficient, but if you are unfamiliar with air brake systems, we recommend having the work done or reviewed by a qualified technician.

Are there any regulations I should be aware of when replacing air tanks or mounting hardware?

Air tanks are a functional part of your truck's air brake system, which is subject to FMCSA and DOT regulations. Any replacement tank should be rated appropriately for your truck's air system pressure requirements, and mounting hardware should be installed securely to prevent movement or leaks. Cosmetic wraps do not carry regulatory requirements since they do not interact with the air system, but they should not obstruct access to drain valves, fittings, or other components needed for regular maintenance and inspections.