These lightweight yet super strong arms reduce un-sprung weight, eliminate wheel hop and help plant the rear tires in corners. Steeda used the technology transfer program with Ford Motor Company to develop these arms and incorporated the proper design rear offset for the rear lower trailing arms. Steeda's exclusive polyurethane bushing package also ensures smooth, quiet operation combined with performance. No increase in NVH (noise, vibration, harshness) with our poly bushings like other arms. Don't settle for anything less than Steeda original innovation.