To use these replacement headlight lenses for your 2009 - 2020 Nissan 370Z, first make sure you have the right part number, which is LF474 - LNS. When installing, note that the clip and screw positions match the OEM, so it should fit easily. If you want to improve the performance further, you can install a set of STi - R clear lenses. Remember to order a roll of Morimoto RetroRubber sealant. Apply it during installation to ensure a proper outer seal and prevent moisture from getting inside the headlights. As for maintenance, the polycarbonate material with a UV - resistant finish helps keep the lenses in good condition. Just clean them regularly with a mild cleaner to keep them looking great.