The Bilstein B6 Performance series (24-131506) is a high-pressure gas monotube shock absorber designed to enhance the handling and stability of classic GM A-body vehicles. Unlike standard replacements, the B6 series provides improved damping characteristics while maintaining original ride height. Features: 36mm monotube design for consistent, fade-free performance, bolt-on installation, and premium valving specifically tuned for 1968 Chevrolet Chevelle and related models. Package contents: 1x Shock Absorber (Art: 24-131506), 1x Mounting Hardware Kit (including bushings, washers, and nuts).