I just bought JDM EG headlights and noticed Password is selling this harness so you can use H4H bulbs. I thought the only difference between H4 and H4H is the diameter of the metal base. I haven't found any information relating to the difference between the connectors except for finding this harness on Password JDM.

Can someone tell me the difference? Thanks.

 

is for the jdm one pieces on da9's. the one piece requires h4h bulbs and the wiring headlight on a da is 9006. basically you converting the wiring 9006 to h4h for the one piece.

 

Oh nice, so I can use my stock USDM harness on the H4H bulbs.

 

yes

 

, now I need to find some good bulbs in H4H. Raybrig or PIAA is what I would prefer, and nothing lower than 4000k. I found some Raybrig 5000k but I don't think they come in H4H.

 

just get some hids. its better. and also it better for the wiring harness. i know the wiring harness can handle the piaa wattage, but you can never be too safe.

 

second that, i'm using jdm headlights in my cdm eh2 with stanely bulbs, works just fine

hid's in eg headlights are crap for projection

 

That's why I don't want HIDs unless I retrofit some projectors, which looks awesome when done right (thank you donut.), so I'll stick to halogens.

When I got JDM headlights for my old BB4 they had some awesome Bosch bulbs in them, the bulbs had almost an ion (multi-colored) tint on them and gave off a light with a slight teal hue. They went out and I just threw them away, wish I knew the part number now.