I believe Spyder manufacture two different models of tail lights. One to suit pre and the other for post facelift. I purchased the latter for my '06 and they seem to work okay, except for a slight flicker of the tail lights (no problem with the brake lights). It was all plug and play for me and they look great. I haven't worried about the flicker, as it's hardly noticeable.
What is 'adaptive brake light'?

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08/06 build 4.4i Stirling Grey over black