Frequently Asked Questions About Peterbilt 375/377 Fuel Tank Fairings

What material are these fuel tank fairings made from, and how durable are they?

Most Peterbilt 375/377 fuel tank fairings are manufactured from either high-grade fiberglass or ABS plastic. Fiberglass options typically feature a gel-coat finish that resists UV damage and minor impacts, while ABS plastic fairings offer excellent flexibility and crack resistance. Both materials are designed to withstand road debris, weather exposure, and regular washing. For maximum durability, look for fairings with reinforced mounting points and a minimum thickness of 3/16 inch.

Will these fairings fit my specific Peterbilt 375 or 377 model year?

Fuel tank fairings for Peterbilt 375 and 377 models are generally compatible across model years 1999-2007, as these trucks share the same frame rail spacing and tank mounting configurations. However, you should verify your specific tank size (typically 100, 120, or 150 gallons) and measure the distance between your frame rails before ordering. Custom exhaust configurations or aftermarket modifications may require additional fitment adjustments.

How difficult is the installation process, and what tools will I need?

Installation typically takes 2-4 hours per side for someone with basic mechanical skills. You'll need a drill with metal bits, a measuring tape, mounting brackets (usually included), stainless steel bolts, and basic hand tools. Most fairings mount using existing frame rail holes when possible, though some drilling may be required. Professional installation is recommended if you're uncomfortable drilling into your frame rails or need to modify the fairings for custom exhaust routing.

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

Fuel tank fairings come in several finish options including primer-ready for custom painting, polished aluminum, chrome-plated steel, and pre-painted white or black. Fiberglass fairings accept automotive paint exceptionally well and can be color-matched to your truck's cab. If choosing a paintable option, ensure the surface is properly prepped with appropriate primer before applying your base coat and clear coat for a professional finish.

Do these fairings affect fuel tank access for filling or maintenance?

Quality fuel tank fairings are designed with maintenance access in mind. Look for models featuring removable panels or strategic cutouts that allow easy access to fuel caps, drain valves, and tank straps without removing the entire fairing. Some designs include hinged access doors for convenient daily use. Before purchasing, verify that the fairing design accommodates your specific fuel cap location and any auxiliary equipment like fuel tank heaters or cross-over lines.