Cusco Front Roll Center Adjuster Toyota Corolla AE86 83-87

The Cusco Roll Center Adapters (RCA blocks or roll center blocks) do a couple of things. Designed to correct the suspension geometry settings by returning the roll center of the front control arms closer to the stock location after you lower your car. This helps cornering as the weight transfer is better ballanced.

Second is rectifying the bump steer, after you lower your car, the amount of angle on the lower arms and tie rods affect how much change in toe you recive as the car goes through its suspension travel. You may notice it as you corner and hit a bump, the steering will jump or jerk.

By putting the angles back to standard geometry settings, it will lessen the amount of toe change you recieve which will give you a smoother steering feedback.