Hi, usually it is not possible to retrofit factory fog lights on a car that was not manufactured with them. Sometimes, the entire bumper needs to be replaced. For your 2018 Civic, please see this link; click on Product Options and note the fog light bezels, which you will probably need for proper installation: https://www.carid.com/2018-honda-civic-bumpers/replace-front-bumper-cover-1514727457.html