Expression of Belgium produces some of the best looking aerodynamic kits available. Moreover, their kits are some of the easiest to install. All bumper spoilers mount to the original bumpers using factory mounting points, saving the task of removing the bumpers or drilling unnecessary holes. Just make a trial fit, remove, paint, then reinstall. Performance Products recommends professional installation, citing the easy installation will reduce shop labor costs. NOTE: Not for use on AMG Sport or SLK 55.