ARP 134-4002 Cylinder Head Stud Kit Chrome Moly Steel - 8740

The ARP 134-4002 is a professional-grade cylinder head stud kit engineered for high-performance and competition engines. This kit features premium 8740 chrome moly steel construction rated at 200,000 psi tensile strength, delivering exceptional clamping force and reliability under extreme cylinder pressures.

Advanced Manufacturing Process:

• Precision heat-treated to 200,000 psi using vertical rack process for complete, uniform heat penetration
• Centerless ground after heat-treat for superior concentricity and straightness
• Thread rolled after heat-treat for approximately 1000% better fatigue strength compared to pre-heat-treat threading
• Undercut design on shorter studs equalizes stretch for more consistent clamping force

Key Benefits:

• Hex head design with wide-area flange eliminates need for valve train removal during head retorquing
• Exceptional dimensional accuracy allows cylinder heads and gaskets to align perfectly during assembly
• Provides more accurate and consistent torque loading compared to head bolts
• Reduces risk of head gasket failure through optimized clamping force distribution
• Includes hardened, parallel-ground washers for even load distribution

Each stud is manufactured to exacting tolerances and stamped with the ARP logo as assurance of quality. This stud kit represents the preferred choice of professional engine builders across all forms of motorsports where reliability and performance are critical.

Installation Note: Studs should be installed finger-tight in a relaxed mode. After initial torquing and engine run-in, re-torque to specification to compensate for head gasket compression.