ARP 235-4108 High Performance Cylinder Head Stud Kit Chrome Moly - 8740

The ARP 235-4108 is a high-performance cylinder head stud kit engineered for serious engine builders who demand superior clamping force and reliability. Manufactured from premium 8740 chrome moly steel and heat-treated to 200,000 psi, these studs deliver exceptional strength and durability for high-performance and racing applications.

Superior Manufacturing Process:

• Premium 8740 chrome moly alloy rated superior to aircraft quality
• Vertical rack heat-treatment to 200,000 psi ensures complete and uniform heat penetration
• Centerless ground for near-perfect concentricity and exceptional straightness
• Thread rolled after heat-treat for approximately 1000% better fatigue strength
• Hex head design for reliable wrench engagement

Performance Benefits:

• More accurate and consistent torque loading compared to bolts
• Easier engine assembly with assured cylinder head and gasket alignment
• Specially undercut shorter studs equalize stretch for more consistent clamping force
• Compensates for head gasket compression to help prevent blown gaskets
• Includes hardened parallel-ground washers for even load distribution

ARP studs are manufactured to exacting tolerances that allow gaskets and cylinder heads to glide into position with perfect alignment. Each stud is marked with the ARP stamp as assurance of quality. These studs install finger-tight in a relaxed mode and stretch only on the vertical axis when torqued, eliminating the twisting forces that affect bolts during installation.

Trusted by professional engine builders across all forms of racing, ARP head studs represent the gold standard in cylinder head fastening technology. Remember to re-torque after initial engine run-in to compensate for head gasket compression.