Whiteline 05-10 Ford Mustang Ball Joints for Roll Center CorrectionWhiteline Roll Center kits are designed to correct roll center geometry using specially engineered ball joints. The KCA439 kit has 3 adjustment settings to provide precision geometry tuning to the varying heights of lowered Mustangs. Raising the front roll center results in a substantial increase to front roll resistance and a significant reduction in suspension compression of the outside front wheel during cornering. The result is more even weight