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Old 02-10-2005, 10:36 PM   #16
nhluhr
John Wayne Toilet Paper
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Join Date: Jun 2001
Chapter/Region: NWIC
Location: Seattle, WA
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2008 Mazdaspeed3
2006 Wrangler Sport

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Quote:
Originally Posted by Fernely
Very nice but it seems there is no H4 bulb replacement alais the GC's are left out yet again...
HIR technology doesn't apply to dual-filament bulbs like the H4 because the glass has to be spherical and the center of the globe needs to be focused on the filament to make it work correctly. With H4, you have two filaments so they aren't in the center of the bulb like with single-filament bulbs like the 9005 and 9006 that 9011 and 9012 can replace.
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