One piece headlight H4H adapter for H4 LED bulbs

Adapters still look fine. Store has been updated. $10 pair.

Again, would love some feedback. I’ll begin printing them today.

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I purchased a pair this morning.

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I am processing several orders right now, so you should get a tracking number via Email. Just FYI:

  • The smaller lip edge mates with the bulb, and the fatter lip on the adapter mates with the headlight housing.
  • There will be some white material left on the adapter part. This is the support material necessary to reduce the chance of warping while printing. You can leave it as-is or sand off if it bothers you (but it is very time consuming).
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I was able to install the adapters and test yesterday. The adapter has good fitment on my bulbs. I was able to reuse the dust covers, which is a plus. After that I went for an hour drive after the sunset. Engine bay temps were about 145F next to my battery. So far the sockets look fine.

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Aww yeah that’s great!

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For those who recently installed these (or attempted to) please reply with results. Did they work? What bulb model? This helps everyone out. Thanks!

I received a message this morning that the “Sealight H4 LED Bulbs - Ultra-Bright Long-Lasting Driving Lights” worked great. I’ve asked for the actual model number because I know Sealight has several H4 models.

The Sealight size I purchased was the X4i H4. The adapters are still holding up fine.