H-A-Motorsports 381294362359 Chevrolet 4-headlight Relay Wiring Harness H4 Headlamp Light Bulb Socket"

For 4 headlight vehicles Installs in seconds (Plug and Play) construction 14 Gauge wire (2X thicker than factory) Street legal Made with heat resistant materials. H4 Heavy Duty Plug-n-Play wiring harness is an easy, inexpensive way to protect your vehicles factory wiring from high output aftermarket upgrad halogens. High performance bulbs are a great way to improve the light output of your vehicle, but some create additional heat that can damage your stock wiring. This Harness installs in between your factory plug, and your new bulb/HID for instant protection.