ARP 256-4202 Cylinder Head Stud Kit Pro Series - 12-Point ARP2000

The ARP 256-4202 cylinder head stud kit is engineered for high-performance and competition engines demanding superior clamping force and reliability. Part of ARP's Pro Series lineup, this kit features premium 8740 chrome moly steel studs heat-treated to 200,000 psi for exceptional strength and durability.

Advanced Manufacturing Process:

• Vertical rack heat-treatment ensures complete and uniform heat penetration throughout each stud
• Centerless grinding creates near-perfect concentricity for precise alignment of gaskets and cylinder heads
• Thread rolling performed after heat-treat delivers approximately 1000% better fatigue strength compared to pre-heat-treat threading
• Undercut short studs equalize stretch characteristics for consistent clamping force across all fasteners

Key Features:

• 12-point head design for secure grip and easy installation
• ARP2000 material rated at 200,000 psi tensile strength
• Includes hardened, parallel-ground washers for even load distribution and accurate torque readings
• Cold-forged construction maintains molecular integrity
• Wide-area flanged head eliminates need for valve train removal during retorquing

Performance Benefits:

• Provides more accurate and consistent torque loading compared to conventional head bolts
• Studs stretch only on vertical axis during torquing, eliminating twisting forces
• Superior alignment simplifies engine assembly and ensures proper gasket seating
• Undercut design compensates for head gasket compression to prevent blown gaskets
• Meets ARP's zero-defect, zero-failure quality standard

This Pro Series head stud kit is designed for competition applications where maximum reliability and performance are essential. Each stud bears the ARP stamp as your assurance of quality and precision manufacturing.