ARP 235-3706 Pro Series Cylinder Head Bolt Kit 12-Point 200,000 PSI

The ARP 235-3706 Pro Series cylinder head bolt kit delivers professional-grade clamping force and reliability for high-performance and competition engines. Engineered for applications where head studs cannot be used due to clearance constraints, these bolts provide exceptional strength and durability.

Key Features:

• Cold-forged ARP2000 alloy construction rated at 200,000 PSI tensile strength
• 12-point head design with wide-area flange eliminates need for valve train removal during retorquing
• Heat-treated prior to thread rolling for superior fatigue resistance
• Undercut short bolts equalize stretch and compensate for head gasket compression
• Includes hardened parallel-ground washers for even load distribution and accurate torque readings
• Reduced wrenching hex design allows clearance for larger diameter valve springs

Engineering Excellence:

ARP Pro Series bolts undergo a rigorous manufacturing process that sets them apart from conventional fasteners. Each bolt is vertically heat-treated in precision racks to ensure complete and uniform heat penetration throughout the material. The thread rolling process occurs after heat treatment, which increases fatigue strength dramatically compared to pre-heat-treat threading methods used by other manufacturers.

Application:

Pro Series head bolts are designed for competition engines and high-performance street applications where maximum clamping force is essential. The wide-area flanged head design permits cylinder head service without valve train disassembly, making them ideal for racing applications requiring frequent maintenance. These fasteners meet ARP's zero-defect quality standard and are trusted by professional engine builders across all forms of motorsports.

Each kit includes all necessary bolts and hardened washers for complete installation. Follow manufacturer torque specifications and re-torque after initial engine operation to compensate for head gasket compression.