ARP 204-4101 Head Stud Kit Pro Series - ARP2000 12-Point

The ARP 204-4101 Pro Series Head Stud Kit represents the pinnacle of cylinder head fastening technology, trusted by professional engine builders in all forms of competitive motorsports. This comprehensive kit features premium ARP2000 material rated at 200,000 psi tensile strength, delivering superior clamping force and reliability for high-performance and racing applications.

Key Features:

• ARP2000 alloy construction with 200,000 psi tensile strength for maximum reliability
• 12-point head design for precise torque application and easy installation
• Cold-forged construction ensures molecular integrity and superior fatigue resistance
• Heat-treated prior to thread rolling for approximately 1000% better fatigue strength
• Centerless ground to exacting tolerances for perfect concentricity and alignment
• Thread rolled after heat-treatment for maximum strength and durability
• Undercut short studs equalize stretch and provide consistent clamping force
• Includes hardened parallel-ground washers for even load distribution
• Wide area flanged nuts eliminate need for valve train removal during retorquing

Manufacturing Excellence:

Each stud in this Pro Series kit undergoes ARP's rigorous vertical rack heat-treatment process, ensuring complete and uniform heat penetration throughout the material. The precision centerless grinding operation involves multiple passes to achieve exceptional straightness and concentricity, allowing cylinder heads and gaskets to glide into position with perfect alignment.

Installation Benefits:

Unlike head bolts which experience torsional stress during installation, studs are installed finger-tight and stretch only along the vertical axis when torqued. This provides more accurate and consistent torque loading, resulting in superior head gasket sealing and reduced risk of gasket failure. The undercut design on shorter studs compensates for head gasket compression, equalizing clamping forces across all fasteners.

This kit meets ARP's zero-defect, zero-failure quality standard and is designed specifically for competition applications where reliability is non-negotiable. Each stud is stamped with the ARP logo as assurance of authenticity and quality.