ARP 435-3601 Cylinder Head Fasteners Stainless Steel Hex Head Bolt Kit

The ARP 435-3601 Cylinder Head Fastener Kit delivers professional-grade engine sealing and clamping force for high-performance and competition applications. This stainless series kit features hex head bolts designed to provide superior strength and reliability compared to standard factory fasteners.

Premium Construction and Heat Treatment:

• Manufactured from premium grade 8740 chrome moly steel alloy rated at 200,000 psi tensile strength
• Vertical rack heat-treatment process ensures complete and consistent heat penetration throughout each fastener
• Centerless ground after heat-treat for exceptional concentricity and straightness
• Thread rolled after heat-treatment for approximately 1000% better fatigue strength compared to pre-heat-treat threading
• Cold-forged construction maintains molecular integrity

Performance Features:

• Hex head design with wide-area flange eliminates need for valve train removal during head retorquing
• Precision manufacturing ensures cylinder heads and gaskets align perfectly during installation
• Undercut short bolts (where applicable) provide equalized stretch for consistent clamping force
• Includes hardened parallel-ground washers for even load distribution and accurate torque readings
• Compensates for head gasket compression to help prevent gasket failure

Installation Notes:

ARP recommends re-torquing head fasteners after initial engine operation as head gaskets will compress during the first heat cycle. Always follow manufacturer torque specifications and use ARP Ultra-Torque assembly lubricant or equivalent for accurate torque readings. Each fastener is stamped with ARP for quality assurance.

This kit represents the same quality and engineering trusted by professional engine builders across all forms of motorsports competition. Whether building a street performance engine or an all-out racing powerplant, ARP 435-3601 fasteners provide the strength and consistency required for reliable cylinder head sealing.