Product Overview
Keep your Holley RetroBright LED Headlights performing at their best with this Hi/Lo Beam LED Replacement Cartridge. Designed as a direct-fit replacement for Holley RetroBright 4″x6″ housings, this cartridge restores the full power and clarity of your LED system — maintaining that classic look while delivering modern lighting performance, longevity, and efficiency.
Key Features & Benefits
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Direct Replacement: Designed specifically for Holley RetroBright 4″x6″ housings.
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Plug & Play Installation: Connects to factory wiring with no modifications needed.
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Hi/Lo Beam Functionality: Maintains full beam versatility for optimal road visibility.
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Superior Brightness: Produces over 2x the light output of traditional halogen sealed beams.
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Extended Lifespan: LEDs last 6× longer than halogen bulbs while using less power.
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Classic Styling: Retro-inspired design keeps your classic vehicle’s authentic look intact.
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Serviceable Design: Simple cartridge replacement makes maintenance quick and cost-effective.
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Durable Construction: UV-treated polycarbonate lens resists impacts and won’t yellow or shatter.
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DOT & SAE Compliant: Beam pattern meets or exceeds regulatory standards for safety.
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Color Options: Choose from Classic White (3000K), Modern White (5700K), or Yellow Lens (5700K bulb inside) to match your vehicle’s style.
Developed in partnership with lighting experts at Morimoto, this replacement cartridge ensures consistent illumination thanks to an internal PWM LED driver that keeps brightness at peak performance, even during extended use.
Performance / Compatibility / Use-Case
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Fits: Holley RetroBright 4″x6″ LED Headlight Housings
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Compatible With: Vehicles using sealed beam sizes equivalent to H5024, 6012, H6014, 6015, 6016, H6017, H6024, H6026
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Mounting Type: Drop-in cartridge design (no cutting or drilling)
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Connector Type: H4
Installation / Fitment / Technical Details
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Beam Type: Hi/Lo
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Bulb Type: PAR56 LED Cartridge
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Color Temperatures: 3000K (Classic White), 5700K (Modern White), Yellow Lens (5700K bulb inside)
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Lifespan: 6× longer than halogen sealed beams
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Compliance: DOT / SAE Approved
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Material: UV-Treated Polycarbonate
Build Quality / Warranty
Warranty: 2-year manufacturer warranty.
What’s Included:
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(1) Holley RetroBright LED Replacement Cartridge (Hi/Lo Beam)
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Note: Sold individually — order one per headlight housing requiring replacement.
Frequently Asked Questions
Why choose this product?
The Holley RetroBright Replacement LED Cartridge gives you the freedom to service and upgrade your existing RetroBright headlights without replacing the entire assembly. It provides brighter, cleaner light output, less heat generation, and a low current draw — ideal for preserving classic wiring systems.
