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Installation: plug and play. Protect your car's factory headlight connector from melting from high wattage light bulb upgrade. Our heavy-duty wire harness are made with heat resistant plastic and high gauge wires to withstand the higher heat output from new models of high-power halogen bulbs. Do not let bad wiring standing between your car and the cool HID Xenon style light bulbs, protect them with this heavy-duty headlight wire harness to fix the problem. This wire upgrade is super easy to do, anyone can finish the installation in 5 to 10 minutes. Headlight heavy-duty wire harness upgrades kit for use with high-power aftermarket halogen light bulb, available for H4, H7, 9004, 9005, 9006, 9007 bulb models Automotive headlight wire harness upgrades for use with aftermarket high power halogen bulbs. Please go to our Bulb & HIDs Section for high performance halogen bulb for your car, available light bulb models: 9004, 9005, 9005XS, 9006, 9006XS, 9007, H1, H3, H4, H7, H8, H10, H11,