Shock Body 4in STJ Series 201mm

The Shock Body 4in STJ Series 201mm from RE SUSPENSION is a precision-engineered replacement shock body designed for builders and mechanics upgrading or repairing suspension systems on lifted trucks, off-road vehicles, and high-performance builds. This component serves as the core damping chamber in modern coilover and monotube shock applications, making it essential for anyone seeking to customize ride quality, ground clearance, or handling characteristics on their platform.

Machined from aluminum and finished with gray hard anodize, the Shock Body 4in STJ Series 201mm delivers durability and corrosion resistance in harsh off-road and salt-exposure environments. The 201mm length and 4-inch body diameter are engineered to accommodate specific damping valves, bypass circuits, and internal piston assemblies, ensuring proper pressure regulation and consistent dampening across suspension travel. Aluminum construction keeps unsprung weight to a minimum—critical for responsive handling and reduced impact transfer to the frame and chassis.

This shock body integrates seamlessly into RE SUSPENSION's STJ Series platform, making it ideal for suspension shops, fabricators, and experienced DIY builders restoring or upgrading existing shock assemblies. The 4-inch diameter and 201mm travel length suit mid-size lifted trucks, rock crawlers, and performance street vehicles where wheel articulation and bump absorption demand precision components. Installation requires internal piston assembly knowledge and proper sealing procedures to maintain pressure integrity and prevent fluid leakage during operation.