ARP 247-4202 Cylinder Head Stud Kit - Pro Series 12-Point 200,000 PSI

The ARP 247-4202 Pro Series Cylinder Head Stud Kit delivers professional-grade clamping force and reliability for high-performance and racing engines. These premium head studs are engineered to ARP's exacting standards, providing superior strength and consistent torque loading compared to conventional head bolts.

Pro Series Construction:

• Premium 8740 chrome moly steel alloy rated at 200,000 PSI tensile strength
• Vertical rack heat-treatment ensures complete and uniform heat penetration
• Centerless ground after heat-treat for exceptional concentricity and straightness
• Threads rolled after heat-treatment for 10x better fatigue strength
• 12-point head design for precise torque application
• Undercut short studs equalize stretch for more consistent clamping force

Performance Benefits:

• Superior clamping force helps prevent head gasket failure
• Studs stretch only on vertical axis during torquing for more accurate and consistent loads
• Precise manufacturing tolerances ensure cylinder heads and gaskets align perfectly during assembly
• Easier engine assembly and servicing compared to head bolts
• Meets ARP's zero-defect, zero-failure quality standard

What's Included:

• Complete stud kit for cylinder head installation
• Hardened parallel-ground washers for even load distribution and accurate torque readings
• ARP Ultra-Torque fastener assembly lubricant (recommended for proper installation)

Each stud is marked with the ARP logo as your assurance of quality. Professional engine builders across all forms of motorsports rely on ARP Pro Series studs for competition engines where failure is not an option. Remember to re-torque studs after initial engine run-in to compensate for head gasket compression.