OK look here's how it IS.
MOST cars use 9004's
92-95 civic's use 9003's 9003 and h4's both fit in the same slot. HOWEVER... h4's are higher current and CAN cause a fire, melting of wires, or blown fuses in a car that's supposed to have 9003.
they make a kit specifically for my gen civic to convert to h4.
h4 and 9003 ARE different.. and 92-95 do take 9003's.
after that I believe they went to h4's but I don't KNOW.
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I am an A$$hole... take anything I say to heart at YOUR OWN RISK...
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