The Pro-Kit spring set adds a new dimension to your GTO's handling. You attack corners with confidence. Hard braking no longer induces a nose dive towards the pavement. Quick lane changes make you feel like an F1 driver instead of a land yacht skipper. Exceptional handling and ride quality are engineered into all Eibach Pro-Kit applications. Eibach's unique progressive rate design on most applications ensures that you'll enjoy your highway trips as much as your canyon runs. Lowers your GTO by about 1.0" in the front and 0.8" in the rear.