ARP 204-4103 Head Stud Kit Pro Series - ARP2000 12-Point

The ARP 204-4103 is a premium head stud kit from ARP's Pro Series lineup, designed for high-performance and racing applications where maximum clamping force and reliability are essential. This kit features 12-point heads for easy installation and does not include an installation tool.

ARP2000 Pro Series Construction:

• Manufactured from premium grade 8740 chrome moly steel alloy rated at 200,000 psi tensile strength
• Precision heat-treated vertically in specialized racks for complete and uniform heat penetration
• Centerless ground to exacting tolerances for near-perfect concentricity and straightness
• Thread rolled after heat-treat for approximately 1000% better fatigue strength than pre-heat-treat threading
• Cold-forged construction ensures molecular integrity throughout the fastener
• 12-point head design with wide-area flange eliminates need for valve train removal during retorquing

Key Benefits:

• Superior clamping force consistency compared to traditional head bolts
• Precision manufacturing allows cylinder heads and gaskets to align perfectly during assembly
• Studs stretch only on the vertical axis during torquing, providing more accurate and consistent load
• Undercut shorter studs equalize stretch for more uniform clamping force across the head
• Includes hardened parallel-ground washers for even load distribution and accurate torque readings
• Meets ARP's zero-defect, zero-failure quality standard

Head studs are preferred over bolts in most applications because they provide easier assembly, better alignment, and more consistent torque loading. Unlike bolts which twist under load, studs should be installed finger-tight and only stretch vertically when the nut is torqued, resulting in superior clamping performance. This kit is trusted by professional engine builders across all forms of motorsports for competition powerplants.

Note: Always re-torque studs after initial engine run-in to compensate for head gasket compression.