Shock Rear GM Metric 8 Comp / 3 Reb

The Shock Rear GM Metric 8 Comp / 3 Reb from BILSTEIN is a precision monotube rear shock absorber engineered for GM A-Body, F-Body, and G-Body vehicles. This single-unit shock delivers responsive damping control that improves ride quality and chassis stability during acceleration, cornering, and braking events. Built to OEM specifications, it restores factory-level suspension performance and is essential for owners seeking reliable shock replacement or suspension upgrades on classic and contemporary General Motors platforms.

The SMX Series construction features a monotube design with a C8-R3 valve architecture, which independently manages compression and rebound damping forces. The 8 compression and 3 rebound valve settings enable fine-tuned control over suspension travel—the 8 Comp rating handles load transfer and body roll under hard acceleration or deceleration, while the 3 Reb setting permits smoother rebound to maintain tire contact with the road surface. Steel construction with black paint ensures corrosion resistance and durability in harsh driving and storage conditions, while the compact 26.5-inch length fits within OEM mounting points.

This rear shock is ideal for drivers restoring suspension integrity on Chevrolet, Pontiac, and Buick A-Body, F-Body, or G-Body models from the 1970s through 1990s. Installation requires removal of the original rear shock and straightforward bolt-on attachment to existing upper and lower mounting brackets—no modifications needed. Each shock is sold individually; most vehicles require two rear shocks for complete suspension replacement, ensuring balanced handling and weight distribution across the rear axle.