ARP 235-4302 Cylinder Head Stud Kit Chrome Moly - 8740 12-Point

The ARP 235-4302 is a high-performance cylinder head stud kit engineered for demanding racing and performance applications. Manufactured from premium 8740 chrome moly steel, these studs are heat-treated to 200,000 psi tensile strength, delivering exceptional clamping force and reliability under extreme conditions.

Superior Manufacturing Process:

• Vertical rack heat-treatment ensures complete and uniform heat penetration throughout each stud
• Centerless grinding process with multiple precision cuts creates exceptionally straight, concentric studs for perfect alignment
• Thread rolling performed after heat-treat provides approximately 1000% better fatigue strength compared to pre-heat-treat threading
• Undercut design on shorter studs equalizes stretch for more consistent clamping force and improved head gasket sealing

Key Features:

• Premium 8740 chrome moly alloy rated at 200,000 psi tensile strength
• 12-point head design with wide-area flange eliminates need for valve train removal during retorquing
• Includes hardened, parallel-ground washers for even load distribution and accurate torque readings
• Cold-forged construction maintains molecular integrity
• Each stud marked with ARP stamp as quality assurance

Advantages of Studs Over Bolts:

Head studs provide superior clamping accuracy because they stretch only on the vertical axis during installation, unlike bolts which experience both torsional and tensile forces simultaneously. Studs should be installed finger-tight in a relaxed mode, then torqued via the nut. This method ensures more consistent and accurate torque loading. The undercut design on shorter studs helps prevent head gasket failures by compensating for gasket compression. Studs also simplify engine assembly by allowing cylinder heads and gaskets to glide into perfect alignment.

Kit includes all necessary studs, nuts, and hardened washers for complete installation. Re-torque after initial engine run-in to compensate for head gasket compression.