The Bilstein B8 Performance Plus shock absorber is a high-pressure gas pressure monotube shock designed specifically to be paired with aftermarket lowering springs. Engineered for the 1999 Mazda Miata 10th Anniversary and all NB chassis models, these shocks offer application-specific valve settings with a short-stroke design to provide the optimized handling performance needed when the vehicle's ride height is reduced. Product features: - 46mm Monotube design for consistent, fade-free performance. - Optimized for use with lowering springs. - Improved safety and enhanced sport handling. - Direct bolt-on replacement. Kit/Component details: - Bilstein Shock Absorber (Front): 24-065504 - Included hardware: Nut, Washers, and Bushings required for installation.