AutoTechSalon 9004 to 9007 Plug and Play Halogen Bulb Conversion Wiring Harness Sockets HiTemp 100w (1 Pair) Super high temperature, precision crafted ceramic input and output sockets...easily handles upgraded halogen bulbs up to 100 watts 24k Gold plated input and output terminal contacts for ultra efficient power transfer, heat dissipation, and lifetime reliability Thick 16 gauge insulated wiring for maximal power transfer, offering greater robustness over existing OEM headlight setups Easy 5 minute PLUG AND PLAY installation converts any existing 9004 Halogen bulb setup to 9007, for increased brightness and driving visibility. No messy or unsafe cutting or splicing of wires or altering bulb bases! Secure locking mechanism ensures bulbs stay in place and do not slip due to vibration