Peterbilt 379 Fairings & Steps

Frequently Asked Questions About Peterbilt 379 Fairings & Steps

Will these fairings and steps fit my Peterbilt 379 without modification?

Most fairings and steps in this category are designed to match the factory mounting points and body lines of the Peterbilt 379, but fitment can vary depending on the model year, cab configuration, and whether your truck has any prior aftermarket modifications. It is a good idea to check the product listing for specific year ranges and confirm your chassis and fuel tank setup before ordering, since fairing shape and step bracket placement can differ between early and late 379 production years.

What materials are these fairings and steps made from, and how do they hold up to daily use?

Fairings are commonly made from durable ABS plastic or fiberglass, while steps are typically constructed from aluminum or steel for strength under repeated foot traffic. Aluminum steps often feature a diamond plate or textured surface for grip, while fiberglass fairings are generally paintable to match your truck's color. The right choice depends on whether you prioritize lighter weight, paint compatibility, or long-term durability in rough conditions.

Can I paint or finish these parts to match my truck?

Yes, fiberglass and most plastic fairings can be painted to match your Peterbilt's color scheme, though proper prep work such as sanding and priming is recommended for a lasting finish. Aluminum steps are usually sold either raw, polished, or with a diamond plate finish, and while they can be coated or powder coated, many customers prefer to leave aluminum bare or polished for easy maintenance.

How difficult is it to install fairings and steps on a Peterbilt 379?

Installation difficulty depends on the specific product, but most fairings and steps are designed to bolt on using existing mounting holes or brackets that correspond to the factory setup. Basic hand tools are usually sufficient, though some fairing installations may require drilling or minor fabrication if your truck has non-standard tanks or frame spacing. We recommend reviewing the included instructions or reaching out to our team if you are unsure about compatibility before you start.

Do fairings affect fuel efficiency, and are steps just for looks?

Fairings are primarily designed to smooth airflow around the fuel tanks and cab, which can help reduce drag and modestly improve fuel efficiency on long hauls, though results vary based on driving conditions and truck setup. Steps serve a practical purpose beyond appearance, providing safer and more stable access to the cab, fuel tanks, and deck for daily inspections and maintenance, so functionality should be a key factor alongside style when choosing a set.