i am going to replace my head lights on my civic to the password super yellow bulbs is this a direct fit or do i need a harness. they are the h4 bulb by the way.

PS: i searched and couldnt find anything regaurding what i was looking for

 

yes, if they are regular usdm headlamps, the H4 will fit.! that's what they are from factory.

 

ok thanks thats what i was wondering