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125 Posts
Discussion Starter #1
I stood there with the Advance Auto guy checking 9003 and H4 bulbs.

They LOOK identical. The specs are identical. Even all the little numbers printed on the metal (lot #'s, etc. were identical.

Soooo... why is an H4 $3 more than a 9003?

IS there a difference somewhere that we didn't see?
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