4″ × 6″ Crystal Rectangular Headlight with Glass Lens

Upgrade sealed-beam headlights with a crystal-clear glass replacement designed for improved clarity, serviceability, and classic OEM styling. This 4″ × 6″ rectangular headlight features a reinforced aluminum reflector, pre-installed halogen bulb, and DOT-approved construction for reliable on-road performance.

A Serviceable Upgrade from Sealed Beam Headlights

Traditional sealed-beam headlights must be replaced as a complete unit when the bulb fails. This crystal rectangular headlight solves that problem by using a replaceable halogen bulb while maintaining the original sealed-beam footprint.

The result is a cleaner beam pattern, improved light clarity, and easier long-term maintenance without changing the factory look.

Classic Design with Durable Construction

Crystal Clear Glass Lens

The glass front lens provides excellent optical clarity and resists yellowing, haze, and UV degradation far better than plastic lenses.

Reinforced Aluminum Reflector

A rugged aluminum reflector enhances light output while offering anti-vibration durability for heavy-duty truck use.

Pre-Installed Halogen Bulb

Supplied with a Sylvania 12V 65/55W 9007 halogen bulb already installed, making this a ready-to-use replacement.

DOT / SAE Compliant

Fully compliant with DOT / SAE standards and FMVSS 108, making it legal for on-road use.

Designed as a Direct Sealed-Beam Replacement

This headlight is designed to replace common sealed-beam part numbers:

• H4651

• H4656

An adapter plug is included to convert the 9007 bulb connection to the H4651 / H4656 wiring style, simplifying installation.

Fitment, Installation & Technical Notes

Vehicle Compatibility

Commonly used on:

• Classic trucks and vehicles using 4″ × 6″ sealed-beam headlights

• Peterbilt 379

• Kenworth W900

Installation Notes

• Minor modification to the original headlight bucket may be required on Peterbilt 379 and Kenworth W900 applications

• Adapter plug included for wiring compatibility

Beam Configuration Options

• Available in high & low beam

• Available in high beam only

Materials, Durability & Warranty Coverage

Built with a glass lens, aluminum reflector, and vibration-resistant construction, this headlight is designed for long-term reliability in demanding road conditions.

Backed by a 6-month warranty covering manufacturing defects.

What’s Included

• 1 × 4″ × 6″ crystal rectangular headlight housing

• 1 × Sylvania 9007 halogen bulb (pre-installed)

• 1 × 9007 to H4651 / H4656 adapter plug

Frequently Asked Questions About the 4″ × 6″ Crystal Rectangular Headlight

What sealed-beam headlights does this replace?

It replaces H4651 and H4656 sealed-beam headlights.

Is the bulb replaceable?

Yes. Unlike sealed beams, this headlight uses a replaceable 9007 halogen bulb.

Is this DOT approved?

Yes. It meets DOT / SAE requirements and complies with FMVSS 108.

Will this fit a Peterbilt 379 or Kenworth W900?

Yes, but minor bucket modification may be required depending on the truck.

Is the wiring adapter included?

Yes. A 9007 to H4651 / H4656 adapter plug is included.

What warranty is included?

This product includes a 6-month warranty covering defects in materials and workmanship.