ARP 235-3709 Pro Series Cylinder Head Bolt Kit - 12-Point

The ARP 235-3709 Pro Series cylinder head bolt kit delivers professional-grade fastening strength for high-performance and competition engines. Designed for builders who demand absolute reliability, this bolt set provides superior clamping force and durability under extreme conditions.

Construction and Materials:

• Cold-forged ARP2000 alloy construction rated at 200,000 psi tensile strength
• Heat-treated prior to thread rolling for exceptional fatigue resistance
• 12-point head design for precise torque application and easy access
• Wide-area flanged heads eliminate need for valve train removal during retorquing
• Reduced wrenching profile allows clearance for larger diameter valve springs

Performance Features:

• Undercut short bolts provide optimized stretch characteristics to equalize clamping force
• Enhanced stretch compensation helps prevent head gasket failures
• Thread rolling after heat treatment delivers up to 10 times better fatigue strength than pre-threaded fasteners
• Precision manufacturing ensures perfect alignment of gaskets and cylinder heads during assembly

What's Included:

• Complete cylinder head bolt set
• Hardened parallel-ground washers for even load distribution and accurate torque readings
• ARP Ultra-Torque assembly lubricant

Each bolt meets ARP's zero-defect, zero-failure quality standard and is manufactured with aerospace-grade precision. The Pro Series design is application-specific and engineered for competition components where reliability is critical. Professional engine builders across all forms of motorsports rely on ARP Pro Series fasteners for their most demanding builds.