SMP LED Headlight Conversion Connector Upgrade to LED lighting without cutting or splicing your factory wiring. The SMP LED Headlight Conversion Connector provides a simple, reliable way to retrofit H4 headlight sockets for modern LED bulbs—ideal for off-road vehicles and everyday drivers alike. Direct replacement for H4 bulbs — plugs into existing H4 sockets for quick installation. High-temp thermoplastic housing — engineered to withstand the elevated temperatures inside headlight housings for long-term durability. No wiring modifications — convert to LED headlights without altering factory wiring, preserving vehicle integrity and resale value. Off-road ready — reliable in harsh conditions where vibration and heat are common. Perfect for DIY enthusiasts and professional installers, this connector delivers a clean, secure connection that supports consistent LED performance and reduces installation time. Compatibility: H4 headlight systems. For best results, verify bulb fitment and housing clearance before installation.