Suitable for plugging into the pins on the H4 halogen as well as the older tungsten headlight bulbs. This ceramic unit is ideal for high wattage bulbs which can get very hot. Strongly recommendchanging both sides. Suitable for an 8.2 amp (98 watt) load. You may need a strip of 15Amp connectors CLS1047 to connect to the existing cables. Sold inPairs