Frequently Asked Questions About Freightliner FL70-FL80 Fender Extensions

What years and models do these fender extensions fit?

Our Freightliner FL70-FL80 fender extensions are designed to fit model years 1996-2007. They work with both FL70 and FL80 models, including variants with single or tandem rear axles. However, fitment may vary slightly depending on whether your truck has factory air ride suspension or aftermarket modifications. We recommend checking your specific VIN with our customer service team if you have a customized setup.

Are these fender extensions made of fiberglass or plastic, and how durable are they?

Most of our FL70-FL80 fender extensions are manufactured from high-grade fiberglass, which offers excellent durability and resistance to road debris. Some economy options use ABS plastic. Fiberglass extensions typically last 5-8 years with proper care and can withstand impacts better than OEM plastic versions. They're also paintable and repairable if damaged, unlike molded plastic alternatives.

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

Installation typically takes 2-3 hours per side for someone with basic mechanical skills. You'll need a drill with metal bits, a rivet gun or bolt hardware, masking tape for alignment, and basic hand tools. The extensions usually mount using existing fender bolt holes plus 4-6 additional drilling points. Many customers report that having a helper makes alignment much easier. Detailed instructions are included with each set.

Do these extensions come painted or primed, and what finishes are available?

Our fender extensions come in three finish options: raw fiberglass (requires primer and paint), white gel-coat (paintable but can be used as-is), and primed gray (ready for your color match). We don't offer pre-painted options due to the variety of fleet colors, but any body shop can easily paint them. The gel-coat finish is UV-resistant and many owner-operators run them white without painting.

Will these extensions work with my existing mud flaps and brackets?

Yes, our fender extensions are designed to work with standard mud flap hangers and brackets. The extensions include pre-marked areas for drilling mud flap mounting holes to match your current setup. If you have oversized or custom mud flaps, you may need to adjust the mounting position slightly. The extensions add approximately 4-6 inches of coverage beyond the factory fender edge.