ARP 135-4303 High Performance Cylinder Head Stud Kit Chrome Moly - 8740 12-Point

The ARP 135-4303 is a high-performance cylinder head stud kit engineered for demanding applications where reliability and precision clamping force are critical. Built from premium 8740 chrome moly steel and heat-treated to 200,000 psi, these studs deliver exceptional strength and durability for both street and competition engines.

Superior Manufacturing Process:

• Premium 8740 chrome moly alloy steel construction rated at 200,000 psi tensile strength
• Vertical rack heat-treatment ensures complete and uniform heat penetration throughout each stud
• Centerless grinding process produces exceptionally straight studs with near-perfect concentricity
• Thread rolling performed after heat-treat for approximately 1000% better fatigue strength compared to pre-heat-treat threading
• 12-point head design for precise torque application

Performance Benefits:

• Studs provide more accurate and consistent torque loading compared to bolts
• Vertical-only stretch during torquing eliminates the twisting forces present when using bolts
• Precision tolerances allow cylinder heads and gaskets to glide into perfect alignment during assembly
• Undercut design on shorter studs equalizes stretch for more consistent clamping force
• Helps prevent head gasket failure through optimized compression compensation
• Includes hardened parallel-ground washers for even load distribution and accurate torque readings

Each ARP stud is manufactured to exacting standards and stamped with the ARP name as assurance of quality. The result is a fastener system that delivers superior clamping force, improved engine sealing, and the reliability demanded by professional engine builders across all forms of racing and high-performance applications.