Peterbilt 357/378 Fairings & Steps

Frequently Asked Questions About Peterbilt 357/378 Fairings & Steps

Will these fairings and steps fit my specific Peterbilt 357 or 378 model year?

Fairing and step designs can vary depending on the model year and cab configuration of your Peterbilt 357 or 378, especially around frame width, fuel tank size, and existing mounting points. Before ordering, check the fitment notes listed on each product page and compare them to your truck's specifications. If you're unsure, having your VIN and cab measurements on hand will help our team confirm compatibility before you buy.

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

Most fairings and steps in this category are constructed from durable materials like aluminum, steel, or heavy-duty poly/fiberglass composites, depending on the specific product. Aluminum and steel options typically offer strength and long-term durability, while poly and fiberglass fairings are often chosen for lighter weight and corrosion resistance. Look at the individual product description for material specifics and any recommended care instructions to maximize lifespan.

Do I need any special tools or professional help to install these parts?

Many fairings and steps are designed for bolt-on installation using the existing mounting points on your truck, so basic hand tools and a helper are often enough for a straightforward install. However, some fairing kits may require drilling, trimming, or adjusting brackets depending on your cab setup. If you're not comfortable with fabrication work or your truck has aftermarket modifications, having a professional installer handle the job can help avoid fitment issues.

Will adding fairings affect my truck's fuel efficiency or airflow?

Fairings are primarily designed to smooth airflow around the cab and reduce drag, which can contribute to modest fuel efficiency improvements on long hauls. The actual impact depends on your driving conditions, truck configuration, and the specific fairing style you choose. Steps, on the other hand, are functional components for access and generally have minimal effect on aerodynamics.

What finish options are available, and can these parts be painted to match my truck?

Fairings and steps are commonly available in raw aluminum, painted, or powder-coated finishes, depending on the manufacturer and product line. Raw aluminum or unpainted options give you the flexibility to paint or wrap them to match your truck's color scheme, while pre-finished parts offer a ready-to-install option. Check the product listing to see what finish is included and whether custom paint matching is something you'll need to arrange separately.