Proper attachment of your fan clutch to the water pump is vital to avoid misalignment, vibration, or cooling system failure. This OEM-style hardware kit restores secure fastening for smooth fan operation—preserving both engine performance and restoration integrity. This reproduction fastener kit mirrors GM Reference # 3964274 and includes four studs, nuts, and lock washers engineered for secure fan clutch mounting on 1970–1981 C3 Corvette models. The kit restores accurate alignment and reduces vibration, helping maintain proper engine cooling and a polished engine bay appearance.