BICYACO 4x6 Inch LED Headlights 4-Pack — DOT Rectangular H4651/H4652 Replacement, 6500K 60W IP67

These BICYACO 4x6 DOT-approved LED headlights (4-pack) replace H4651/H4652/H4656/H4666 fittings to deliver bright, waterproof, plug-and-play lighting for trucks and classic vehicles.

Upgrade factory sealed-beam lamps to modern LEDs with this four-piece kit from BICYACO. Built for heavy-duty vehicles and older cars that use 4x6 inch rectangular housings, the set includes wiring harnesses and anti-flicker circuitry so installation is quick and reliable. Aluminum housings and an IP67 rating mean the lights stand up to road spray, cold starts, and long highway miles while providing a crisp 6500K white beam.

How do these headlights perform in real-world driving?

The BICYACO LEDs produce a defined cut-off with both high and low beams, designed to improve forward visibility without scattering glare into oncoming drivers' eyes. With 60W nominal output per lamp and a 6500K color temperature, they deliver a bright, neutral-white light that helps you spot road details earlier.

• High/low beam functions with a sharp cutoff for safe illumination.
• 6500K pure white output for clearer road contrast.
• 60W rated power per headlight for consistent brightness.
• Anti-flicker circuitry to prevent strobe or blinking on startup.

Will these lights survive wet, cold, and long-haul conditions?

BICYACO engineered the housings with aluminum alloy heat sinks and sealed electronics to resist water and temperature extremes. The IP67 rating confirms protection against dust and immersion, while the alloy body dissipates heat to preserve LED life across long duty cycles.

• IP67 waterproof sealing for reliable wet-weather operation.
• Aluminum alloy body with integrated heat-dissipation fins.
• Tested for cold-weather starts and continuous highway running.
• Estimated service life up to 50,000 hours under normal use.

How easy is installation and what comes in the box?

Designed as plug-and-play for most vehicles using 4x6 inch rectangular lamps, the kit includes four H4/9003 harnesses and straightforward instructions so you can swap lamps in about 20 minutes. The integrated anti-flicker board eliminates the need for extra resistors in most installs.

• 4x 4x6 inch LED headlamps ready to fit standard rectangular housings.
• 4x H4 (9003/HB2) wiring harnesses included for plug-and-play hookup.
• Printed instructions and built-in anti-flicker circuitry for stable output.
• Typical install time approximately 20 minutes per vehicle.

What vehicles and lamp types are these compatible with?

This four-pack fits a broad range of trucks, SUVs, and older passenger cars that use 4x6 rectangular headlights. Compatibility covers popular commercial models from Kenworth, Peterbilt, Freightliner and many Chevy models plus vintage sedans and pickups that accept H4651/H4652/H4656/H4666-style replacements.

• Compatible with Kenworth T800/T400/T600 and Peterbilt 357/378/379.
• Fits Freightliner models and many Chevy trucks, Blazers, and Suburbans.
• Replaces H4651/H4652/H4656/H4666 factory sealed-beam units.
• Works with vehicles using 4x6 inch rectangular housings and H4 plugs.

Who is this for? Drivers who want a straightforward upgrade from old sealed-beam or halogen 4x6 lights — especially truck owners, fleet operators, and classic-car enthusiasts — will appreciate this BICYACO kit. It’s aimed at people who need a durable, DOT-compliant LED solution that installs quickly, keeps maintenance low, and improves night-time visibility without modifying the vehicle’s wiring or housing.