Bolt Kit - 6pt. (5) 5/16-18 x 1.000

The ARP Bolt Kit - 6pt. (5) 5/16-18 x 1.000 is a set of five chromoly fasteners engineered for precision engine building, racing applications, and high-performance assembly work. Part number 651-1000 delivers the structural integrity demanded by engines operating under sustained high loads, where standard hardware fails. ARP bolts are the specification choice for engine rebuilds, head stud replacement, intake manifold security, and any critical fastening point requiring guaranteed clamp load and fatigue resistance.

Each bolt in this ARP 651-1000 kit features 5/16-18 thread pitch with a 1.000-inch length and 3/8-inch hex head geometry. The chromoly steel construction delivers superior tensile strength compared to standard Grade 8 hardware, while the black oxide finish resists corrosion and provides a professional appearance. The 5-point star head design ensures consistent torque application without rounding, critical when working with precision torque wrenches on engine work. This universal kit accommodates a wide range of engine blocks, intake manifolds, and accessory mounting applications across domestic and import platforms.

Serious engine builders, performance shops, and motorsports enthusiasts rely on ARP fasteners to maintain consistent clamping force through thermal cycling and mechanical stress. The 5/16-18 diameter makes this kit ideal for mid-range fastening duties where lightweight aluminum heads meet cast iron blocks, or where secondary fastening points require premium reliability without the cost of larger-diameter studs. Whether rebuilding a classic engine, upgrading an existing platform, or assembling a new build, this ARP bolt set ensures your critical joints stay secure.

ARP bolts are manufactured to ISO 4014 standards and independently tested for clamp load consistency. The brand's heritage in racing and high-performance engine building makes ARP the go-to fastener for builders who cannot afford fastener failure. At 0.21 lbs for the five-piece set, this kit offers a compact, ready-to-install solution for your next engine project or maintenance procedure.