Give your C5 the re-engineered performance of the new 2004 Z06 Shock Absorbers. GM engineers have refined the Z06’s shock absorbers damping characteristics to provide improved handling in the most challenging conditions, while maintaining good ride control for the demands of daily driving. Continual analysis, development and refinement of the shock valves in particular resulted in more damping control and force, delivered more smoothly. This new tuning is aimed at diminishing the impact of yaw and roll on the car, particularly in quick maneuvers or a series of tight corners. These refinements are a result of extensive testing and development, including several high-speed test sessions at Germany’s famed Nürburgring race track. Fits all 1997-2004 C5/Z06. NOTE: 2004 Z06 Shocks are not compatible with electronic / adjustable suspensions.