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If you are talking about the illuminated, I recently installed them. Instructions were a little weak on the electrical hook-up but overall pretty easy. Watch removing the vent covers that are down low on either side of the center console. Not even sure you really need to remove them.
The sills are the rocker panels. They run under the doors from the back of the front wheel to the front of the back wheel. The Sport sills flare out, look cool. They're call sills in the Coupe brochure.