The Powerflex USA Rear Sway Bar Bushing (18 mm) - PFR550418 is a high-quality replacement bushing for the rear sway bar of a vehicle. It is designed to improve the handling and stability of the vehicle by reducing body roll during cornering. The bushing is made from durable polyurethane material, which is resistant to wear and tear and provides better performance compared to the stock rubber bushings. It has a diameter of 18 mm, making it suitable for vehicles with a 18 mm rear sway bar. This bushing is specifically designed for use in the USA and meets all necessary standards and regulations. It is a direct fit replacement and can be easily installed without any modifications.