Steering Rack Mount bush. Round hole in the Centre of the Mount, Right Side, Supplied as Each Suspension Bushes are some of the most Highly stressed components fitted to a vehicle. They undergo a lot of stress with no maintenance. Standard Bushes deteriorate with age resisting forces put on it, This can cause uneven tyre wear or increased stress on other components such as the suspension. With Powerflex they are made from a material designed to overcome this. They are 25-30% stiffer than the standard alternative making for increased performance and safety .