Dual Relay H4 LED Headlight Wiring Harness Kit – Premium Upgrade for Reliable Performance

High-Temp Ceramic Plugs
– Heat-resistant ceramic sockets ensure durability, preventing melting even under extreme conditions, ideal for high-wattage LED or halogen bulbs.
Dual Relay System
– Independent relays for high/low beams reduce voltage drop, delivering maximum power to headlights for brighter, more consistent illumination.
Heavy-Duty Wiring
– Thick-gauge OFC (oxygen-free copper) wires with superior conductivity minimize resistance, ensuring stable current flow for long-term reliability.
Universal Plug-and-Play
– Compatible with most H4 bulb vehicles (cars, trucks, SUVs, motorcycles), featuring corrosion-resistant terminals for quick, secure installation.
Enhanced Safety
– Integrated fuse protection and waterproof relays prevent electrical shorts, suitable for off-road, nighttime driving, or harsh weather conditions.
OEM-Level Craftsmanship
– Precision-engineered connectors with abrasion-resistant insulation and soldered joints for vibration-proof performance.