Bilstein B1 - Sway Bar Adapter Kit 13-15 Porsche 911 CarreraBilstein B1 (Components) Sway Bar Adapter kits are engineered to be used in conjunction with Bilstein coilover kits installed on vehicles equipped with active sway bar systems. This kit makes it possible to install a Bilstein ride height adjustable coilover kit and retain the full functionality of the factory active sway bar system. All required components and instructions are included in the kit for easy installation. This Part Fits: Year Make Model