ARP 204-4705 High Performance Head Stud Kit Chrome Moly - 8740

The ARP 204-4705 Head Stud Kit delivers professional-grade engine fastening with premium 8740 chrome moly steel construction rated at 200,000 psi. Designed for high-performance and competition applications, this kit features undercut studs and 12-point nuts for superior clamping force and reliability.

Advanced Manufacturing Process:

• Premium 8740 chrome moly alloy rated far superior to aircraft quality
• Vertical rack heat-treatment to 200,000 psi ensures complete heat penetration
• Centerless ground after heat-treat for exceptional concentricity and straightness
• Thread rolling performed after heat-treat provides 10x better fatigue strength
• Undercut design on shorter studs equalizes stretch for consistent clamping force

Key Benefits:

• Superior strength and durability for high-performance engines
• Precision tolerances allow gaskets and cylinder heads to align perfectly
• More accurate and consistent torque loading compared to bolts
• Easier engine assembly with assured proper head and gasket alignment
• Reduces risk of head gasket failure through optimized clamping force
• 12-point nuts and wide-area flanged design eliminate need for valve train removal during retorquing

What's Included:

• Complete head stud kit with hardened parallel-ground washers
• 12-point nuts for precise torque application

Each ARP stud is stamped for quality assurance and manufactured to exacting tolerances that meet ARP's zero-defect, zero-failure quality standard. The undercut stud design compensates for head gasket compression, providing more even clamping force across the cylinder head surface. Remember to re-torque studs after initial engine break-in as head gaskets will compress during operation.

This kit is ideal for competition engines and high-performance street applications where maximum reliability and consistent clamping force are critical. Studs install finger-tight in a relaxed mode and stretch only on the vertical axis when torqued, unlike bolts which twist during installation.