Dinan D100-0916 Performance Spring SetDinan's Performance Spring set for the F02? Alpina B7L (non xDrive)? provides greater control over body roll by virtue of carefully calibrated spring rates. Additionally, Dinan lowers the vehicle by a 1 2 inch in front and 1 2 inch in the rear for improved suspension geometry and an even more aggressive stance. The Dinan springs are CNC wound with high tensile chrome silicon wire and shot peened for stress relief to last the life of the car. The