ARP 235-4519 Cylinder Head Stud Kit High Performance Chrome Moly - 8740

The ARP 235-4519 is a high-performance cylinder head stud kit engineered for serious engine builds where reliability and precision matter most. These head studs are manufactured from premium 8740 chrome moly steel and heat-treated to 200,000 psi tensile strength, delivering exceptional clamping force and durability under extreme conditions.

Key Features:

• Premium 8740 chrome moly alloy rated at 200,000 psi tensile strength
• Precision heat-treated vertically in racks for complete and consistent heat penetration
• Centerless ground for exceptional concentricity and straightness
• Thread rolled after heat-treat for 10x better fatigue strength
• Undercut studs equalize stretch for more consistent clamping force
• Hex head design for reliable installation and torquing
• Includes hardened parallel-ground washers for even load distribution

Why Choose Head Studs Over Bolts:

Head studs offer significant advantages for performance applications. Unlike bolts which experience both torsional and tensile loads during installation, studs stretch only along the vertical axis when torqued. This provides more accurate and consistent torque loading. Studs also simplify engine assembly by ensuring proper cylinder head and gasket alignment every time. The undercut design on shorter studs equalizes stretch rates across all fasteners, compensating for head gasket compression and helping prevent gasket failures.

Manufacturing Excellence:

ARP's manufacturing process sets the standard for fastener quality. Each stud undergoes centerless grinding through approximately ten precision cuts, resulting in parts so true that cylinder heads and gaskets glide into perfect alignment during assembly. This level of precision is simply not found in competitor products that use less rigorous manufacturing methods.

For engine builders who demand zero defects and zero failures, ARP Pro Series head studs represent the pinnacle of fastener technology. Each kit includes everything needed for professional installation, with hardened washers and studs bearing the ARP stamp as your assurance of quality.