Compare Kenworth W900 replacement headlights, including round and rectangular LED lamps, dual-headlight assemblies, heated options and mounting components. Match your W900 variant, installed housing and required beam function before choosing.
Check the exact lamp dimensions, connector, bucket clearance and package contents. W900A, W900B and W900L lighting arrangements should not be treated as interchangeable, especially when a truck has been modified.
Start with the lamp arrangement on your truck, then compare beam function, mounting depth and wiring. Use the exact product application rather than assuming every W900 uses the same replacement.
Identify the model variant, year and equipment actually installed. The W900A RetroBright listing covers 5.75-inch round sealed-beam applications; the W900B/W900L RetroBright listing covers compatible 4×6 rectangular setups. Each arrangement needs the correct housing, retainers and clearance; neither listing establishes a conversion between them.
Match low-beam, high-beam-only or combined-beam lamps to the position and circuit being serviced. Retain the companion lamps required by the truck’s lighting system. A combined-beam replacement does not mean other required lamps can be removed.
Compare lamp depth, mounting points, voltage and connector pinout. United Pacific 31388 low-beam-position housings include an H4656 adapter; 31390 high-beam housings include an H4651 adapter. These exact designs may require modification to the original W900 bucket.
Distinguish an individual lamp, a dual-headlight assembly and mounting components before ordering. Confirm quantities and included hardware for the selected variation. Position lights, turn signals and heated-lens features have product-specific wiring requirements. Follow the installation instructions, test all functions and aim the lamps after fitting.
Use the model variant and year together with the installed housing, lamp markings, connector and retaining hardware. The W900 name alone does not make every round or rectangular headlight setup interchangeable.
Match the replacement’s stated function to the position and circuit being serviced. A combined-beam lamp does not mean the other required lamps in a multi-lamp system can be removed.
No. The exact design determines the connection and mounting needs. United Pacific 31388 supplies an H4656 low-beam-position adapter; 31390 supplies an H4651 high-beam adapter. The manufacturer notes that the original W900 bucket may need modification for these housings.
Use the wiring instructions for the selected headlight. Added functions can have separate leads or harness requirements, so identify their intended circuits before installation rather than assuming the main headlight plug supplies them.
Count the beam positions you intend to replace and compare that with the selected listing’s package quantity. An individual lamp, a pair and a complete assembly are different purchase units; keep any required companion high- or low-beam lamps in the plan.
Not as a direct assumption. The RetroBright listings cover 5.75-inch round W900A applications and 4×6 rectangular W900B/W900L applications respectively. Match the installed housing and retaining hardware, especially on modified trucks.
Do not rely on the title alone. The W900 RetroBright listings use “kit” in the title but describe an individual lamp in their package information. Confirm the exact contents with BTS before ordering, then match the quantity and beam functions to your truck’s layout.
