The original rubber bushing have proven to be a weak link that that can fail prematurely and allow the suspension to rock and move during acceleration, braking and corning, significantly affecting the handling and performance of the car. Powerflex improved polyurethane material is stronger and the 2 piece design allows for easy installation without special tools. To inspect your mount, look for signs of the rubber separating where it is attached to the outer housing.
These bushings are sold in the required number for one car for the specified location.