Z-OFFROAD 4x6 LED Headlight Assemblies 4PCS Chrome — DOT-Approved Hi/Lo, 6500K Bright Beam

Z-OFFROAD 4x6 DOT-approved LED headlight assemblies are a plug-and-play Hi/Lo sealed beam replacement that delivers a brighter, focused 6500K beam and a DOT-compliant Z-shaped cutoff for safe road use.

Upgrade older sealed-beam lamps with this four-piece Z-OFFROAD chrome kit designed for 4x6" headlamp openings. Built to replace H4651/H4652/H4656/H4666/H6545-style units, the set fits many classic and commercial vehicles — from Chevy trucks and Suburbans to Peterbilt and Freightliner models — and brings modern LED performance while maintaining legal DOT optics.

How much brighter are these LEDs compared with stock halogen bulbs?

These Z-OFFROAD LEDs use high-quality chips rated at roughly four times the brightness of typical halogen sealed beams. You get a crisp 6500K white color that improves visibility and contrast without shifting color balance harshly toward blue.

• Rated output: ~5200 lm per pair on both low and high modes.
• High/Low power: 108W per pair in each mode for consistent illumination.
• 6500K color temperature for clear white light and better signage recognition.

Will these headlights glare or blind oncoming drivers?

Z-OFFROAD engineered a clear Z-shaped cutoff line on the low-beam pattern to reduce glare and keep light aimed on the road. The assemblies carry DOT SAE approval and have the detailed DOT code etched on the lens for compliance in the U.S. and Canada.

• DOT-compliant beam pattern to minimize oncoming glare.
• Separate high and low beam circuitry for correct light distribution.
• Precise projector optic reduces hot spots and blind areas.

Are these lights durable enough for heavy use and harsh weather?

The housings are fully sealed aluminum with a shatter-resistant polycarbonate lens, rated IP67 for water and dust protection. Design elements like 8 breather valves and strong heat dissipation let the heads run cool and resist moisture, corrosion, and fogging for long service life.

• Heavy-duty aluminum body with UV-protected PC lens.
• IP67 waterproof rating and anti-fog breather valves.
• Expected lifespan over 50,000 hours with anti-flicker electronics.

How easy is installation and what’s included in the kit?

The package is prepared for straightforward replacement of standard 4x6 sealed beams: it includes four LED assemblies, H4 connectors, installation accessories, and instructions. Most vehicles will accept the assemblies as direct replacements; simply match the headlight polarity and connectors to the supplied H4 plugs.

• Contents: 2 high-beam and 2 low-beam LED heads, 4 H4 connectors, instructions.
• Voltage: 12V DC compatible with common truck and automotive systems.
• Compact dimensions: 4.25" H x 6.61" W x 2.80" D for standard 4x6 openings.

Who this is for: Drivers restoring classic trucks, owners of heavy-duty and commercial vehicles, and anyone running older 4x6" sealed-beam lamps who wants a brighter, more reliable LED upgrade without modifying the vehicle’s headlight buckets. If you need DOT-compliant optics, a focused beam pattern, and a robust housing for all-weather use, this Z-OFFROAD 4x6 kit is aimed at those exact needs.