Dinan Performance Spring SetDinan's Performance Spring set for the E39 M5 provides greater control over body roll by virtue of carefully calibrated spring rates. Additionally, Dinan lowers the vehicle by 1 4" in the front and a 1 4" 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 increase in stiffness of the
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