Race Tech Gold Valve Shock Kit - 40mm SMGVS4005 Proven bolt-on shock valving system that improves control, traction, performance and bottoming resistance Increased flow area puts valving control on the shim stack for outstanding tunability Improved, long-wearing, low-friction sealing design decreases fade Includes complete instructions, Shock Gold Valve Piston, valving shims, valving charts and Technical Edge Shock Maintenance and Gold Valve Installation Video