Peterbilt 389 Fuel Tank Fairings

Frequently Asked Questions About Peterbilt 389 Fuel Tank Fairings

What are fuel tank fairings and what do they do?

Fuel tank fairings are the panels that fit between and around the fuel tanks on a Peterbilt 389, closing the gap beneath the cab and sleeper. They smooth out the airflow along the underside of the truck, help cut down on road spray and debris getting kicked up around the tanks, and give the whole fuel tank area a finished, factory-style look.

Will these fairings fit my truck's specific tank setup?

Fairing fit depends on your fuel tank diameter, spacing, and mounting configuration, which can vary between Peterbilt 389 setups. Before ordering, check the tank size and spacing listed for each fairing against your own truck's specs, and reach out to our team if you're not sure your measurements match up. Getting this right up front will save you time during install.

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

Most fuel tank fairings for the 389 are made from aluminum or heavy-duty poly/composite material, with aluminum options often available in polished, diamond plate, or painted finishes. Aluminum tends to hold up well against road debris and is easy to keep clean, while composite options can offer good durability at a lighter weight. Either way, regular washing helps maintain the finish and prevent buildup of grime or road salt.

Can I install these myself, or do I need a shop?

Many drivers and owner-operators install fuel tank fairings themselves using basic hand tools, since most kits bolt on using existing mounting points or included brackets. That said, because you're working around fuel tanks and straps, take your time, double check that nothing interferes with tank removal or maintenance access, and have a shop handle it if you're not comfortable with the job.

Do fairings make it harder to access the fuel tanks for maintenance or draining?

Well-designed fairings are built to work around normal fuel tank service needs, but they can add an extra step when you need to pull a tank or get to straps and drain plugs. It's worth checking whether the fairing you're considering requires removal for routine maintenance or if it has cutouts or access points already built in, so you know what to expect down the road.