ARP 290-4301 High Performance Head Stud Kit Chrome Moly - 8740 12-Point

The ARP 290-4301 is a high-performance head stud kit engineered for serious engine builders who demand maximum strength and reliability. Manufactured from premium 8740 chrome moly alloy rated at 200,000 psi, these studs deliver exceptional clamping force and durability for high-performance and racing applications.

Superior Manufacturing Process:

• Premium 8740 chrome moly alloy heat-treated to 200,000 psi using vertical rack method for complete heat penetration
• Centerless ground for near-perfect concentricity and straightness, ensuring perfect alignment of gaskets and cylinder heads
• Thread rolled after heat-treat for 1000% better fatigue strength compared to pre-heat-treat threading
• 12-point head design for precise torque application
• Specially undercut shorter studs (where applicable) equalize stretch for consistent clamping force

Key Benefits:

• Provides more accurate and consistent torque loading compared to bolts
• Easier engine assembly with assured cylinder head and gasket alignment
• Studs stretch only on vertical axis during torquing, eliminating torsional stress
• Helps prevent head gasket failures through optimized clamping force
• Ideal for competition engines requiring frequent disassembly and servicing

Each kit includes hardened, parallel-ground washers for even load distribution and accurate torque readings. ARP stamps each stud as your assurance of quality and their ZERO defect, ZERO failure standard. Perfect for professional engine builders and serious enthusiasts building high-performance powerplants.

Note: Studs should be installed finger-tight in relaxed mode. Re-torque after initial engine run-in to compensate for head gasket compression.