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Kenworth W900B/W900L Fuel Tank Fairings
Frequently Asked Questions About Kenworth W900B/W900L Fuel Tank Fairings
What's the difference between W900B and W900L fuel tank fairings, and will they fit my truck?
W900B fairings are designed for the shorter hood models (typically 1987-2010), while W900L fairings fit the long hood versions. The main difference is the mounting bracket placement and overall length. To ensure proper fitment, check your VIN or measure from the back of your cab to the front of your fuel tank. W900B fairings typically measure 36-40 inches, while W900L fairings run 48-52 inches. Most fairings manufactured after 2005 will fit trucks through current model years, but always verify your specific measurements before ordering.
Are these fairings made from fiberglass or aluminum, and which material holds up better?
Most aftermarket fuel tank fairings are constructed from hand-laid fiberglass with gel coat finish, though some premium options feature aluminum construction. Fiberglass fairings typically weigh 15-25 pounds each and offer excellent durability when properly maintained. They resist rust and can handle minor impacts without denting. Aluminum fairings are lighter (10-15 pounds) and more resistant to cracking but can show dents more easily. Both materials can last 10+ years with proper care, though fiberglass tends to be more cost-effective for most drivers.
How difficult is the installation process, and what tools or modifications are required?
Installation typically takes 2-4 hours per side for someone with basic mechanical skills. You'll need standard hand tools, a drill with metal bits, and possibly a grinder for minor adjustments. Most fairings come with universal mounting brackets that attach to existing fuel tank straps or frame rails. Common challenges include aligning the fairings with your specific tank configuration and ensuring proper clearance for tire chains. Some trucks may require drilling 4-6 mounting holes per side. We recommend dry-fitting everything before drilling to ensure proper alignment.
What finish options are available, and can they be painted to match my truck?
Standard fairings come in polished stainless steel, chrome-plated steel, or primer-ready fiberglass. Stainless options include mirror polish or brushed finishes. Fiberglass fairings arrive in black gel coat or white primer, ready for custom painting. For color matching, any automotive body shop can paint fiberglass fairings using your truck's paint code. Chrome and stainless fairings can be wrapped but not painted. LED light cutouts are available on most models, with options for 2-inch, 4-inch, or 6-inch round lights.
Will these fairings work with my aftermarket fuel tanks or step boxes?
Most fairings are designed to work with standard 100-150 gallon round or D-shaped tanks. Compatibility issues typically arise with custom tank sizes over 150 gallons or non-standard mounting configurations. Fairings generally provide 2-3 inches of adjustability through slotted mounting holes. If you have aftermarket step boxes, measure the clearance between your tank and step - you'll need at least 1.5 inches for proper fairing installation. Some drivers with custom setups trim fairings for perfect fit, which doesn't affect warranty if done properly.