Frequently Asked Questions About Kenworth W900A Frame Light Bars & Filler Panels

What material are these frame light bars made from, and will they rust or corrode?

Our Kenworth W900A frame light bars are constructed from heavy-duty steel with a chrome-plated or powder-coated finish, depending on the specific model you choose. The chrome-plated options feature triple-chrome plating for maximum corrosion resistance, while powder-coated versions use industrial-grade coating that resists chipping and fading. Both finishes are designed to withstand road salt, weather exposure, and regular washing. For maximum longevity, we recommend regular cleaning and applying a protective wax to chrome surfaces every few months.

Will these light bars fit my specific year W900A, and are there differences between model years?

These frame light bars are designed to fit Kenworth W900A models from 1961 through 1985. However, there are slight mounting variations between early models (1961-1972) and later models (1973-1985). The main difference is in the frame rail spacing and mounting hole patterns. Before ordering, check your frame rail width - early models typically have 34-inch spacing while later models use 34.5-inch spacing. Our product descriptions specify which years each light bar fits, and our customer service team can help verify compatibility with your VIN if needed.

How difficult is the installation, and what tools or modifications are required?

Installation typically takes 2-4 hours and requires basic hand tools including wrenches, sockets, and a drill with metal bits. Most light bars use existing frame holes, but some applications may require drilling 2-4 additional mounting holes. You'll need to wire the lights to your existing electrical system - we recommend using a relay and fuse for proper protection. Many customers report the hardest part is routing the wiring cleanly. Professional installation usually runs $200-400 if you prefer not to tackle it yourself.

What's the difference between light bars with round lights versus rectangular lights?

Round light bars typically feature 2-inch or 2.5-inch LED or incandescent lights in a traditional style that matches the classic W900A aesthetic. These usually come in configurations of 6, 8, or 10 lights. Rectangular light bars use modern LED panels that provide brighter, more uniform light output with lower power consumption. Round lights give a more period-correct appearance, while rectangular LEDs offer better visibility and longer lifespan. Both styles are available in amber, red, or clear lens options depending on your local regulations and preferences.

Do filler panels come with the light bars, or do I need to order them separately?

Filler panels are sold separately from light bars in most cases. Filler panels are the decorative pieces that mount between lights or fill unused light positions for a clean, finished appearance. We offer both chrome and painted filler panels to match your light bar finish. A complete installation typically requires 1-2 filler panel sets depending on your light configuration. Some deluxe kits include both light bars and matching filler panels - these are clearly marked as complete kits in our product listings.