Frequently Asked Questions About Freightliner Cascadia 113/125 Fairings & Steps

Will these fairings and steps fit my specific Cascadia model year?

Our fairings and steps are designed to fit Freightliner Cascadia 113 and 125 models from 2008 to present (2024). However, there were minor design changes in 2018 that affect mounting points. Pre-2018 models use different bracket configurations than 2018+ models. Always verify your truck's build date and check the product description for specific year compatibility. If you're unsure, contact us with your VIN and we'll confirm the correct parts for your truck.

What's the difference between OEM and aftermarket fairings in terms of quality and durability?

OEM fairings are made from ABS plastic with UV inhibitors and typically last 7-10 years. Aftermarket options vary widely - premium aftermarket fairings use similar ABS materials and can match OEM quality at 30-40% less cost. Economy options often use thinner fiberglass or lower-grade plastics that may crack or fade within 2-3 years. Look for fairings with at least 3mm wall thickness and UV protection. Chrome and stainless steel options offer superior durability but cost significantly more.

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

Most fairings and steps install in 2-4 hours with basic tools. You'll need a socket set (10mm-19mm), drill with metal bits, rivet gun, and torque wrench. Side fairings typically use existing mounting holes, while bumper fairings may require drilling 4-6 new holes. Step installations are more complex, requiring removal of fuel tanks on some models. Common challenges include aligning pre-drilled holes (they may be off by 1-2 inches) and accessing tight mounting areas behind the bumper. Professional installation runs $200-400 if you prefer to avoid these challenges.

What finish options are available and how do they hold up?

Standard finishes include unpainted black plastic, painted to match, chrome-plated ABS, and polished stainless steel. Unpainted plastic can be painted but requires proper prep with adhesion promoter. Factory-matched paint typically lasts 5-7 years before needing touch-ups. Chrome ABS looks great initially but may peel or pit after 3-4 years of heavy use. Polished stainless steel requires regular maintenance but won't rust or peel. Consider your climate and maintenance schedule when choosing - chrome works well in dry climates while stainless excels in salt-heavy regions.

Do aftermarket fairings affect fuel economy and are they DOT compliant?

Properly designed fairings can improve fuel economy by 2-5% at highway speeds by reducing aerodynamic drag. However, poorly fitted or damaged fairings that flap or create gaps can actually decrease efficiency. All fairings sold on our site meet DOT requirements for commercial vehicles. Look for fairings with smooth edges, tight panel gaps (less than 1/4 inch), and secure mounting systems. Side extenders and chassis fairings typically provide the best MPG improvements, while cosmetic chin spoilers offer minimal fuel savings but enhance appearance.