Universal H4 HID Xenon Bulb Wiring Harness with Relay
Premium copper-core wires ensure stable 12V power delivery and minimal voltage drop for optimal bulb performance. High-temperature-resistant insulation protects against engine heat, enhancing durability. Integrated 30A relay prevents overheating and switch damage, extending the lifespan of HID/LED conversions. Direct plug-and-play design simplifies installation for H4 headlight systems. Ideal for off-road, trucks, and daily drivers upgrading to 35W/55W xenon bulbs. Precision-engineered waterproof connectors resist corrosion in harsh weather conditions. Backed by rigorous QC testing for reliable performance. Bulk order discounts available—global wholesale pricing.