Shock Rear GM Metric 4 Comp / 6 Reb

The Shock Rear GM Metric 4 Comp / 6 Reb from BILSTEIN is a precision-engineered monotube rear shock absorber designed for classic GM A-Body, F-Body, and G-Body platforms. This purpose-built damper delivers the refined suspension control that vintage and modified muscle cars demand, whether you're restoring a Chevelle, Camaro, or Monte Carlo to stock specifications or upgrading your setup for improved handling and comfort. Built to exacting OEM metric standards, this rear shock replaces worn or inferior factory units that plague older General Motors vehicles.

At its core, the Shock Rear GM Metric 4 Comp / 6 Reb utilizes BILSTEIN's proven monotube design with a C4-R6 valve configuration—meaning four compression stages and six rebound stages—that allows independent tuning of both bump and rebound behavior. This valve architecture prevents oscillation and harshness, absorbing road imperfections while maintaining tire contact during acceleration, braking, and cornering. The steel body features durable black paint to resist corrosion, and the 26.5-inch length positions it perfectly for rear-axle mounting on metric-equipped GM platforms, delivering consistent, fade-free damping through extended driving sessions.

Mechanics and enthusiasts rebuilding or upgrading classic GM muscle cars will find this rear shock essential for restoring stable, predictable suspension geometry. The multi-stage valve system excels in both street and light competition use, controlling squat under acceleration and dive under braking—critical for vehicles that may carry variable loads or see spirited driving. Installation is straightforward on compatible A-Body, F-Body, and G-Body applications; verify your vehicle's specific mounting points before ordering to ensure proper fitment and alignment.