RGM Styleline Side Sills â To Cover Existing Sills. â Ford Mustang 2015 Onwards âď¸ Choice of colour options ⢠Black ⢠Silver ⢠Carbon Look ⢠Gloss Black âď¸ Adds a sporty style to the side of your car. âď¸ Supplied with full mounting kit and fitting instructions using pre-fitted 3M tape âď¸ Designed & manufactured in the UK