Upgrading to HID bulbs on your H4 9003 headlights? You're gonna need this relay harness. It's brand new, from Xotic Tech (part #AD51), and it makes the whole installation way easier and safer. See, HID kits draw more power, and using this harness takes the load off your car's factory wiring – it connects directly to the battery and uses relays to power the bulbs. That means brighter, more stable light and no risk of melting your stock plugs. It's basically plug-and-play, works with most aftermarket HID bulbs and conversion kits. Comes with a 90-day warranty. Just hook it up to your battery, ground it, and plug the H4 connectors into your new HID ballasts. Super simple for a DIY install. Whether you're putting HIDs in your car, truck, or motorcycle, this little harness is a must-have to do it right. Keep your electrical system happy and your lights shining bright!
