ARP 135-4302 Cylinder Head Stud Kit Chrome Moly - 8740 12-Point

The ARP 135-4302 is a high-performance cylinder head stud kit featuring premium 8740 chrome moly steel construction, designed for serious performance and racing applications. These studs are engineered to provide superior clamping force and reliability compared to standard head bolts.

Premium Manufacturing Process:

• 8740 chrome moly alloy rated at 200,000 psi tensile strength
• Vertical rack heat-treatment ensures complete and uniform heat penetration
• Centerless ground after heat-treat for exceptional concentricity and straightness
• Thread rolled after heat-treatment for 10x better fatigue strength
• 12-point head design for precise torque application

Performance Advantages:

• Studs provide more accurate and consistent torque loading than bolts
• Eliminates twisting forces during installation for true clamping force
• Precision tolerance ensures perfect alignment of gaskets and cylinder heads
• Undercut shorter studs (where applicable) equalize stretch for consistent clamping
• Helps prevent head gasket failure through optimized compression compensation

Each kit includes hardened, parallel-ground washers to ensure even load distribution and accurate torque readings. ARP studs are the choice of professional engine builders across all forms of motorsports for their proven reliability and zero-defect quality standard.

Installation Note: Studs should be installed finger-tight in a relaxed mode. Torque is applied to the nut only, allowing the stud to stretch uniformly on the vertical axis. Re-torque after initial engine run to compensate for head gasket compression.