Bolt Kit - 6pt. (5) 3/8-16 x 3.500

The Bolt Kit - 6pt. (5) 3/8-16 x 3.500 from ARP is a premium fastener solution designed for serious engine builders and performance mechanics who demand absolute reliability under extreme conditions. This six-point bolt kit is essential for high-horsepower applications where standard fasteners simply cannot tolerate the pressures, vibrations, and thermal cycling inherent in modified or turbocharged engines. Whether you're assembling a race engine, upgrading cylinder head fasteners, or reinforcing critical drivetrain connections, ARP bolts represent the industry standard for repeatability and strength.

ARP's proprietary manufacturing process produces bolts with superior tensile strength and consistent clamp load characteristics that far exceed standard hardware store fasteners. The 3/8-16 thread specification with 3.500-inch length accommodates most common engine applications, from small-block to big-block configurations. Each kit contains five bolts, allowing you to replace critical fasteners at key junction points—typically head bolts, main studs, or intake manifold connections—where uniform clamping force directly impacts engine stability and longevity. The six-point design ensures maximum engagement with standard sockets, reducing stripping risk during installation and removal cycles.

Professional engine builders and transmission specialists rely on ARP fasteners when durability and precision matter most. These bolts excel in applications involving nitrous oxide systems, supercharger installations, and high-compression builds where combustion pressures exceed 100+ PSI. Installation requires a torque wrench calibrated to ARP specifications, along with their recommended thread lubricant to achieve proper preload. Mechanics appreciate the consistency—each bolt in the kit performs identically, eliminating weak points in critical assemblies and enabling repeatable, predictable engine performance across multiple builds.