Bolt Kit - 6pt. (5) 7/16-14 x 4.250

The Bolt Kit - 6pt. (5) 7/16-14 x 4.250 from ARP is a premium fastening solution engineered for high-performance automotive applications where critical clamping force and reliability are non-negotiable. Whether you're assembling a stroker engine, upgrading cylinder head fasteners, or securing vital drivetrain components, this five-piece bolt set delivers the precision and durability that separates a built engine from a failed one. ARP fasteners have become the industry standard for performance builders because they eliminate the variables that cause joint separation under extreme load and heat cycles.

Each bolt in this kit features a 7/16-inch diameter with a 14 threads-per-inch (TPI) fine pitch and a 4.250-inch length, making them ideal for long-reach fastening applications in modern engine platforms. The 6-point head design provides superior engagement with hex sockets and wrenches, reducing rounding risk during installation and removal—critical when working with premium fasteners. ARP bolts are typically manufactured from proprietary alloy steel and feature specialized heat treatment that exceeds standard SAE specifications, delivering higher tensile strength and yield points that maintain clamping load even as engine temperatures fluctuate and cylinder pressure spikes during high-RPM operation.

This bolt kit suits engine builders, performance shops, and serious enthusiasts tackling cylinder head installation, main cap upgrades, or other critical fastening tasks on small-block and mid-size engine platforms. Proper torque sequencing with an accurate torque wrench and ARP's recommended assembly lube ensures consistent clamp load across all fastening points, preventing head gasket failure and block distortion. Always consult your specific engine's service manual and ARP's technical documentation to confirm thread compatibility and torque specifications for your application.