This extends upward to form a solid air dam when your rear spoiler is raised. It has an accordion shape that can crack over time which will negatively affect the downforce from your rear wing. Sold individually. 1 needed per car. We recommend that you inspect the lower plastic seal for damage, it if needs to be replaced, it is part #, 99351253300

This item may need to be sourced from Germany and would take 2-4 weeks to arrive. Once ordered it cannot be canceled. Please call to check stock or request expedited shipping.