ARP 100-3207 5/16-24 x 2.500" Black Hex Water Pump Pulley Stud Kit with 1.250" Fan Spacer

The ARP 100-3207 is a premium black oxide hex head water pump pulley stud kit designed for high-performance engine applications. This specialized fastener kit features 5/16-24 threads with a 2.500-inch overall length and includes an integrated 1.250-inch fan spacer, making it ideal for custom cooling system installations where additional clearance is required between the water pump pulley and fan assembly.

Key Features:

• Premium ARP 8740 chrome moly steel construction for exceptional strength and durability
• Black oxide finish provides corrosion resistance and professional appearance
• Hex head design allows for easy installation and precise torque application
• 5/16-24 thread pitch ensures secure engagement in water pump housings
• Integrated 1.250-inch fan spacer eliminates need for separate spacer hardware
• 2.500-inch overall length accommodates custom pulley and fan spacing requirements
• Precision-rolled threads for superior fatigue resistance compared to cut threads

ARP fasteners are engineered to aerospace standards and are the preferred choice of professional engine builders and racing teams worldwide. This stud kit is ideal for small block and big block V8 applications where proper fan-to-radiator clearance is critical, particularly in forced induction or high-RPM applications where cooling system reliability is paramount.