I bought the H11 and H4 headlight kit and after installing i found these to be rather bright, lol like blinding bright. So it would be a good idea to re-adjust the headlight after installation. Anyways the build quality is consistent on both the H11 and H4 and is a simply plug and play. Also to note that the H11 has a label on the connector which says ' + ' and ' - '. (i always thought H11 could have been plugged in any orientation, hmm.) Also to note, the fan located at the base of the bulbs isn't loud at allI hope to get a long life out of these :). I would recommend this product.
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