SoCal-LED 2X 4S HB4 9006 Headlight Bulbs LED Conversion Kit 80W 8000LM COB LED Bulb, 6000K Crystal White, 4-Sided Light High Popwer 4-Side LED Conversion Kit with 360 degree illumination Technology, super bright LED bulb which can replace HID Xenon and traditional Halogen Lamp. Perfect beam pattern LED Headlight with TrueBeam ATEC Illumination Technology, Crystal clear 6000K white lighting output shine without dark spots. Smart Efficient Cooling System, Built-In Cooling Fan @7000 rpm and Space Turbo Cooling Technology, made with high quality aluminum alloy body. Directly plug and play for most vehicles,easy installation. Yet for some American/European or newer vehicles built in CAN-BUS system, it may require the load resistor or decoder to avoid the error code or blinking issues. If bulb doesn't turn on at first, you may have to rotate the plug (reverse polarity) because some vehicle use negative ground wire for power. Cross Reference Number: 9006,9012, HB4; used for replacing the stock headlight or fog light lamps, please DOUBLE CHECK with owner's Manual. <span class="a-text-bold">Please double check the size of the bulb with your car before purchase. </span>The amazon bulb fitment guide only tell you if these fit your vehicle, However! It will not tell you if its for fog, low beam or high beam. Please check your car Owner&#039;s Manual. We Suggest you to use Sylvania or Philips automotive lamp replacement guide online to ensure you purchase the right size bulb.