Peterbilt 388 Air Tanks, Wraps & Mounting

Frequently Asked Questions About Peterbilt 388 Air Tanks, Wraps & Mounting

What is the difference between an air tank and an air tank wrap?

The air tank itself is the cylindrical reservoir that stores compressed air for your truck's brake and accessory systems. An air tank wrap is a decorative cover, typically made of stainless steel or aluminum, that fits around the outside of the tank to improve its appearance and protect the surface from road grime, corrosion, and minor impacts. Wraps do not replace the tank's structural or functional role, they simply dress it up.

Will these air tanks and wraps fit my Peterbilt 388 without modification?

Products listed in this category are designed to match the mounting dimensions and tank sizes commonly found on the Peterbilt 388. That said, tank placement and bracket configurations can vary slightly depending on your truck's build year, chassis setup, and any prior modifications. We recommend checking the measurements and mounting hardware specifications on each product page against your existing tank and brackets before ordering.

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

Air tanks are typically constructed from steel to safely hold pressurized air, while wraps are most commonly available in polished or brushed stainless steel and aluminum. Stainless steel wraps tend to resist corrosion and hold their shine longer with basic maintenance, while aluminum options offer a lighter weight alternative. Regular cleaning helps prevent road salt and brake dust from dulling the finish or contributing to surface corrosion over time.

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

Mounting a new air tank usually involves securing it to the frame using the provided brackets and hardware, then reconnecting the air lines and fittings that were removed from the old tank. Basic hand tools, a wrench set, and possibly a torque wrench for proper bracket tightening are typically all that is needed. Wraps generally install around the existing tank using clamps, straps, or adhesive-backed hardware, and do not require disconnecting any air lines. Always relieve air pressure from the system before doing any work near the tank or fittings.

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

Air tanks are part of your truck's air brake system, so any replacement tank should match or exceed the capacity and pressure rating of the original equipment to keep your braking system operating as designed. Since air tanks are safety-related components, it's a good idea to have any replacement inspected as part of your routine maintenance checks. Decorative wraps do not affect brake system function, but make sure they don't interfere with air line routing, drain valves, or moisture ejectors on the tank.