Whiteline Control Arm (Upper & Lower Bushing) - Buick Century 1973-1977Whiteline Control Arm (Upper & Lower Bushing) 19731977 Buick Century Part #: W56430 Overview If you're experiencing uneven tyre wear, unbalanced braking, or a less predictable rear end during cornering on your Buick Century from 1973 to 1977, worn or degraded control arm bushings could be the culprit. Over time, factory bushings can deteriorate due to age, exposure to elements, and driving conditions, leading to compromised handling, increased noise,