Our Nissan Z carbon rear exhuast shield covers are made by metal press process. There will be no air inside, means for the long term it will not turn yellow or crack under hot sun UV. Perfect fit direct install with provided 3M double side. Surface is UV protect GEL coated. This is made with 3K cross weave carbon. Best quality on the market. These will fit all 2023 up Nissan Z. Kit comes as a set for left and right.