ARP 135-3602 High Performance Cylinder Head Bolt Kit

The ARP 135-3602 High Performance Series cylinder head bolt kit delivers professional-grade fastener technology for demanding engine builds. Engineered from premium 8740 chrome moly steel and rated at 180,000 psi (15% stronger than Grade 8), these bolts provide superior clamping force and reliability for high-performance applications.

Key Features:

• Premium 8740 chrome moly steel construction with 180,000 psi tensile strength
• Hex head design with wide area flange eliminates need for valve train removal during retorquing
• Cold-forged to ensure molecular integrity and maximum strength
• Thread rolled after heat treatment for superior fatigue resistance
• Centerless ground for precise concentricity and perfect alignment
• Includes hardened parallel-ground washers for even load distribution
• Vertical rack heat treatment ensures complete and consistent heat penetration

Engineering Excellence:

ARP's manufacturing process sets the industry standard for fastener quality. Each bolt is vertically heat-treated to ensure uniform properties throughout, then centerless ground through multiple precision cuts to achieve exceptional straightness. The thread rolling process occurs after heat treatment, resulting in dramatically improved fatigue strength compared to pre-heat-treat threading methods. This meticulous approach ensures that cylinder heads and gaskets align perfectly during assembly.

Application:

The High Performance Series is designed for street and mild competition engines where superior strength and reliability are required. The reduced wrenching hex and flanged head design allows for cylinder head retorquing without removing valve train components, making maintenance more convenient. These bolts are ideal for forced induction applications, high-compression builds, and any engine requiring fasteners that exceed OEM specifications.

Each kit includes all necessary head bolts and hardened washers for a complete installation. ARP's reputation among professional engine builders is built on their zero-defect manufacturing standards and uncompromising commitment to quality.