Product Overview
Problem
Classic big‑rigs with 4×6 sealed‑beam headlights often rely on thin, hard‑to‑service plastic buckets. When a bulb fails, the entire sealed beam must be replaced; vibration and weather quickly corrode mounting points, and aftermarket buckets frequently crack or fit poorly. Drivers with Kenworth W900/T800, Freightliner FLD, Western Star 4900 and similar models report frustration with flimsy housings and limited upgrade options.
Solution
These universal 4×6 sealed‑beam bucket assemblies offer a robust, serviceable alternative. Built to OEM specifications, they replace standard 4×6 buckets and accept replaceable‑bulb headlights, so you can run Starr HR4656/HR4651 conversions or other 4×6 LED/halogen units. The removable dust‑cap allows bulb changes from the rear without removing the entire assembly, while the standard 3‑pin plug ensures compatibility with most truck wiring. Because the kit is built from heavy‑gauge metal with corrosion‑resistant coatings, it withstands long‑haul vibration and weather better than factory plastic buckets.
Key Features & Benefits
Direct OEM Replacement
Designed to replace 4×6 sealed‑beam headlight bucket assemblies on a wide range of trucks. Precise fitment and finish match OEM standards, eliminating the flimsy feel of aftermarket plastic housings.
Removable Dust‑Cap Design
A rear dust‑cap lets you service bulbs from the back in minutes—no need to remove the entire headlight. This feature makes routine maintenance quicker and reduces long‑term costs.
Perfect for LED/Halogen Conversions
Optimized for Starr HR4656/HR4651 and other 4×6 conversion headlights, the buckets accept replaceable‑bulb housings. Whether you prefer high‑performance LEDs or traditional halogen sealed beams, the assemblies are ready to accommodate your choice.
Standard 3‑Pin Weather Pack Plug & Complete Kit
Each assembly includes an industry‑standard Weather Pack 3‑pin harness, mounting hardware, bezels and chrome covers. The plug is widely available through truck dealerships and ensures straightforward wiring.
Built for the Long Haul
These buckets use heavy‑duty metal and corrosion‑resistant coatings for long‑term durability. Unlike thin aftermarket housings, they resist vibration, weather and flaking finishes, keeping your headlights aligned and secure for years.
Flexible Compatibility
Designed for Kenworth W900 and T800, Freightliner FLD series, Western Star 4900 and many other trucks using 4×6 sealed‑beam headlights. They also fit custom builds and other heavy‑duty applications. BTS Lighting lists these buckets under Peterbilt 379 headlights, and heavy‑duty lighting specialists note that 4×6 sealed‑beam pods such as PN 447‑411003/004 are good replacements for Peterbilt 379 and 389 trucks.
Performance / Compatibility / Use-Case
Serviceable vs. Sealed Beam
Traditional sealed‑beam headlights combine the bulb and housing; when the filament burns out, you replace the entire assembly. The removable dust‑cap design of these buckets transforms your 4×6 lights into a serviceable system. Replace only the bulb—saving time and reducing waste.
Compatibility Concerns
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Kenworth & Freightliner – Direct replacements for W900, T800 and FLD‑series buckets.
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Western Star 4900 – Fits the factory mounting points for easy installation.
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Peterbilt 379 and 389 – Because these trucks use dual 4×6 sealed‑beam pods, universal 4×6 buckets (such as PN 447‑411003/004) are listed as good replacements for Peterbilt 379/389. BTS Lighting categorizes this product under Peterbilt 379 headlights, underscoring its compatibility.
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Custom Applications – Suitable for any rig or off‑road project using 4×6 sealed‑beam headlights.
Compared to Alternatives
Many aftermarket 4×6 buckets are molded from thin plastic and lack service access. OEM replacements from major truck brands can be expensive and still require sealed‑beam bulbs. Universal 4×6 buckets from BTS Lighting offer OEM‑grade metal construction with serviceability at a competitive price, supporting LED/halogen conversions and long‑term reliability.
Installation / Fitment / Technical Details
Installation
While this might not be a complete plug‑and‑play kit on some models, installation is straightforward:
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Remove the original bucket by loosening the mounting screws or drilling out factory rivets and disconnecting the old harness.
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Mount the new bucket, aligning it with the OEM holes and securing it using bolts or new rivets.
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Connect the harness using the included standard 3‑pin plug.
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Install your chosen 4×6 conversion headlight, then replace the rear dust‑cap.
Most DIYers can complete the upgrade with basic hand tools. The included 14‑gauge wiring harness and adjusters ensure proper alignment.
Fitment & Technical Specs
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Fitment – Replaces any 4×6 sealed‑beam headlight bucket assembly. Designed for dual‑square headlight pods on heavy‑duty trucks.
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Plug Type – 3‑pin harness for low/high‑beam sealed‑beam or conversion headlights.
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Cap Type – Removable dust‑cap provides rear access to the bulb.
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Construction – Heavy‑gauge metal with corrosion‑resistant finish for OEM‑level durability.
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Bulb Compatibility – Works with replaceable‑bulb conversion headlights; bulbs sold separately.
Build Quality / Warranty
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Durability – Built to OEM specifications, the assemblies resist vibration, corrosion and flaking finishes.
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Materials – Heavy‑gauge steel housing with chrome bezel and cover; 14‑gauge wiring harness included.
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Standards – Uses industry‑standard 3‑pin connector; designed to meet or exceed DOT requirements when paired with DOT‑approved 4×6 headlights. (Always confirm your chosen headlight’s certification.)
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Warranty – BTS Lighting provides a manufacturer warranty (typically one year) on materials and workmanship; contact support for details.
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Brand Credibility – BTS Lighting specializes in heavy‑duty lighting. They list this product under multiple truck categories, including Kenworth, Freightliner, Western Star and Peterbilt 379, reflecting confidence in cross‑compatibility.
Warranty: 1-year manufacturer warranty.
What’s Included
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Driver‑side or passenger‑side 4×6 bucket assembly (or a pair).
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14‑gauge wiring harness with 3‑pin plug.
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Dual‑square bezels and chrome cover.
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Mounting screws, adjusters and hardware.
Note: Headlight bulbs are not included; purchase Starr HR4656/HR4651 or other 4×6 conversion headlights separately to suit your preference.
Frequently Asked Questions
Are these bucket assemblies compatible with my Peterbilt 379 or 389?
Yes. The Universal 4×6 buckets replace standard 4×6 sealed‑beam pods, and truck‑lighting specialists note that replacement pods like PN 447‑411003/004 are good replacements for Peterbilt 379/389 trucks. BTS Lighting also lists these buckets under Peterbilt 379 headlights. They mount directly into the 4×6 dual‑square pods on your 379/389 and accept LED or halogen conversion headlights.
What trucks are these buckets designed for?
These assemblies are built for Kenworth W900/T800, Freightliner FLD, Western Star 4900 and other rigs using dual 4×6 sealed‑beam headlights. They also fit Peterbilt 379/389, and many custom projects and classic pickups. If your vehicle uses 4×6 sealed‑beam pods with a 3‑pin plug, these buckets will likely fit.
Do the buckets come with headlights or bulbs?
No. The kit includes the driver and passenger bucket assemblies, wiring harness, bezels, chrome covers and mounting hardware. You must purchase 4×6 conversion headlights (LED or halogen) separately. The buckets work with replaceable‑bulb housings like Starr HR4656/HR4651.
How difficult is the installation?
Installation is straightforward and can be done with basic tools. Simply remove your old buckets, connect the provided 3‑pin harness, mount the new buckets using the supplied hardware and install your chosen 4×6 headlights. The removable dust‑cap allows easy bulb changes from the rear.
Can I use LED conversion headlights with these buckets?
Absolutely. These buckets are designed for replaceable‑bulb conversion headlights, including high‑performance LED units like the Starr HR4656/HR4651. Just make sure your chosen headlight is DOT‑approved for road use and compatible with a 3‑pin plug.
Do these buckets improve lighting performance?
While the bucket assemblies themselves don’t increase lumens, they enable you to upgrade to modern LED or halogen conversion headlights that offer greater brightness and energy efficiency. The sturdy construction also keeps your headlights properly aligned, ensuring consistent beam pattern and improved road visibility.
Are these buckets DOT‑approved?
The buckets are built to OEM standards and are designed to work with DOT‑approved 4×6 headlights. Compliance ultimately depends on the headlight you install. Use DOT‑certified LED or halogen conversions to maintain road legality.
