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Old 12-02-06, 08:20 AM   #1 (permalink)
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Lightbulb DIY: modifying 9006 base to fit in H4H housing

Upon installation of my 9006 hid kit into my 1-piece headlights, I decided to dremel the 9006 bulb base to fit into the H4H housing (rather than dremeling the H4H housing which takes 10 times longer). This mod is easy and just took a few minutes to do with a dremel, and is great for those who wish to install 9006 HID kits into their 1-piecers. THE RESULT IS A PERFECT FIT!

WARNING! Do this at your own risk! Keep in mind that you most likely will not be able to return the bulbs after tampering!

(For those who do not know, USDM headlamps use 9006 bulbs and JDM headlamps use H4H bulbs. The differences are that the USDMs have seperate high beams and low beams, where as the JDMs have H3 fog lights where the USDM high beams would be and they use JDM H4H bulbs which contain dual filaments for the purpose of low and high beams in one bulb. And by doing this mod you are replacing the H4H dual filament bulb with a 9006 bulb, losing the high beams, no big deal bcuz 9006 HIDs are bright enough in my opinion)

The 9006 base is the same circular size as the H4H base, but the difference on the 9006 bulb base is that two out of three of the 'legs' are not in the exact positions as the H4H bulb base, plus there is not an 'indent' on that one side needed for fitment.

So we must dremel the two 'legs' that do not fit, trimming it and leaving just a tip of the 'legs' left so that the bulb doesnt fall thru; plus we need to carve an indent on the one side of the base where the H4H housing has a bump there requiring the indent (there is only one bump in the H4H housing even tho the H4H bulb has two indents, as shown in the pics below)

easy as 1-2-3...
1. Observe both 9006 and H4H bulbs and identify the differences, notice where to trim!
2. Wrap the bulb with plastic wrap and a rubber band, then use your dremel to trim away!
3. Clean up and go install your newly modified 9006 bulbs into your 1-piece H4H housings!

(If the bulb base still doesnt fit perfectly then identify the spot where you must trim some more)


Here are some sample images to make it clear and simple...


Pic of 9006 bulb AFTER DREMELING:
[notice the trimmed indent and how much of the 'legs' i left (just enough so the bulb doesnt fall thru and that it clears the walls for fitment)]


Pic of H4H JDM(/VDM) 1-piece housing


Pic of a perfect fit:


Dremel tool i used:



(the gas pocket in the 9006 hid bulb lines up with the filament in the H4H bulb, so the beam pattern was about exactly the same before and after)



enjoy ur lights and GOOD LUCK!
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Last edited by VDM GS; 01-02-07 at 03:41 AM.
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Old 12-02-06, 08:25 AM   #2 (permalink)
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Nice job! I really need to have this done! I sent you a PM!
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Old 12-02-06, 08:41 AM   #3 (permalink)
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Just one question.... Can you really see they road with those 1200K HIDs? looking at your sig that greenish blueish light looks like it doesn't give you any usable light, but the fogs is what is actually lighting up the road for you??
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Old 12-02-06, 05:14 PM   #4 (permalink)
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nice you got that off... looking good...
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Old 12-03-06, 01:40 AM   #5 (permalink)
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Quote:
Originally Posted by MoisTiCaL View Post
Just one question.... Can you really see they road with those 1200K HIDs? looking at your sig that greenish blueish light looks like it doesn't give you any usable light, but the fogs is what is actually lighting up the road for you??
i know its said that 12000ks are not as bright as 4000k-6000k, but its still way brighter than the standard stanley halogens that came with the 1-pieces (and those were pretty bright, but yellowish), the road is much more visible, especially reflective paint, signs, n road markers. By the way the pic used to be in my sig was with the LOWS OFF
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Last edited by VDM GS; 12-04-06 at 07:30 AM.
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Old 12-08-06, 03:13 AM   #6 (permalink)
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All updated w more pics!

Would a moderator please move this to the DIY section..thx
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Old 12-08-06, 11:41 AM   #7 (permalink)
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great diy! yea this should be moved to the diy section for sure! i may do this...
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Old 12-09-06, 01:03 AM   #8 (permalink)
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Quote:
Originally Posted by VDM G View Post
i know its said that 12000ks are not as bright as 4000k-6000k, but its still way brighter than the standard stanley halogens that came with the 1-pieces (and those were pretty bright, but yellowish), the road is much more visible, especially reflective paint, signs, n road markers. By the way the pic used to be in my sig was with the LOWS OFF

while that maybe true...

its all about how your eyes respond the the color spectrum...

blue and violet are the hardest colors for they eyes to distinguish...

so in terms of luminosity... yeah it will be brighter...

will that brighter blueish purple 12000k light be any better...

my opinion is no... its just worse... a bright light you cant see...
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Old 12-09-06, 12:37 PM   #9 (permalink)
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EDM headlights has H4 bulbs not H4H.
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Old 12-09-06, 01:54 PM   #10 (permalink)
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my mistake, i just assumed, thx i fixed it. so im guessing EDMs have seperate highs and lows and no fogs?
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Old 12-09-06, 02:01 PM   #11 (permalink)
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Quote:
Originally Posted by VDM G View Post
my mistake, i just assumed, thx i fixed it. so im guessing EDMs have seperate highs and lows and no fogs?
Yes they have separate highs and lows and no fogs. EDM Legends with oem foglights are very rare. I know only 2 sedans and no coupes.
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Old 12-10-06, 01:49 AM   #12 (permalink)
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ic so the edm headlamps are like the usdm headlamps.. interesting
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Old 12-14-06, 08:53 AM   #13 (permalink)
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Quote:
Originally Posted by VDM G View Post
ic so the edm headlamps are like the usdm headlamps.. interesting
except edm is glass not plastic. And edm corners has no side marker light. Headlights and corner lights are separate.

Last edited by lgnd; 12-16-06 at 09:07 AM.
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Old 12-14-06, 05:53 PM   #14 (permalink)
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so they're one piecers too? wow i'd love to see pics of the edms.
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Old 12-14-06, 06:23 PM   #15 (permalink)
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no they're two piece...

search for mike diaz and his edms and you'll see
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