S/S Bolt Kit - 12pt. (5) 3/8-16 x 2.750

The S/S Bolt Kit - 12pt. (5) 3/8-16 x 2.750 from ARP is a premium stainless steel fastener set engineered for serious engine builders, performance mechanics, and automotive enthusiasts tackling high-stress applications. These bolts are purpose-built to replace factory fasteners in critical engine assemblies where reliability under load and vibration resistance are non-negotiable. Whether you're assembling a stroker motor, upgrading cylinder head hardware, or securing intake manifolds on a forced-induction build, this kit delivers the durability and consistency that separates a weekend project from a bulletproof engine.

ARP bolts are manufactured to exacting standards with superior tensile strength compared to OEM hardware, and this 3/8-16 specification with 2.750-inch length is ideal for applications demanding precise clamping force without stretch or thread stripping. The 12-point head design provides multiple engagement points, reducing the risk of rounding when using impact tools or socket wrenches on older or corroded fasteners. Stainless steel construction offers corrosion resistance and maintains structural integrity in high-heat environments, while the kit's five-piece quantity makes it suitable for single-component repairs or as a starter set for staged engine modifications. These bolts are sized for medium-duty engine work, commonly used in valve cover, oil pan, and timing cover applications across a wide range of platforms.

Professional mechanics and DIY builders choose ARP fasteners to eliminate warranty-voiding failures from inadequate hardware. This kit pairs well with custom gasket sets, high-flow intake manifolds, and billet valve covers on street and track builds. Installation is straightforward with standard hand tools, though applying ARP's recommended thread lubricant ensures consistent torque specs and prevents galling on stainless threads. Verify your specific engine's bolt pattern and thread requirements before purchase to ensure compatibility with your platform.