Peterbilt 357/378 Fuel Tank Fairings

Frequently Asked Questions About Peterbilt 357/378 Fuel Tank Fairings

What are fuel tank fairings and what do they do?

Fuel tank fairings are the exterior panels that cover the space between the fuel tanks and the frame rails on your Peterbilt 357 or 378. They smooth out the airflow along the underside of the truck, give the tank area a finished, factory-style look, and help shield the tanks and mounting hardware from road debris, dirt, and moisture.

Will these fairings fit my specific Peterbilt 357 or 378 configuration?

Fit can vary depending on your fuel tank diameter, tank spacing, and wheelbase, so it is important to check the listed dimensions and tank size on each product page before ordering. If you are unsure about your truck's tank measurements or setup, contact our parts team with your VIN or tank specs and we can help confirm the correct fairing for your rig.

What material are these fairings made from, and how do the finish options compare?

Fuel tank fairings in this category are typically offered in aluminum or steel, and finish options usually include raw, painted, or polished/chrome-look styles depending on the specific listing. Aluminum options are generally lighter and more resistant to corrosion, while steel tends to offer more rigidity. Painted or polished finishes will require periodic cleaning and care to keep their appearance looking sharp over time.

What is involved in installing a fuel tank fairing?

Installation generally involves mounting brackets or straps that attach the fairing to the existing tank straps or frame hardware. Most fairings are designed to bolt on using factory mounting points, but exact hardware and instructions can differ by manufacturer and style. We recommend reviewing the installation details or included instructions on each product listing, and having basic hand tools on hand before starting the job.

Do fuel tank fairings affect fuel tank access or maintenance?

Fairings are designed to cover the gap between the tanks and frame without blocking essential access points like drain valves or straps, but some designs may require partial removal to reach certain fittings during service. If routine access to your fuel tank hardware is a priority, check the product description or ask our team about clearance around valves and straps before purchasing.