S/S Header Stud Kit - 3/8in x 1.670in OAL (16)

The S/S Header Stud Kit – 3/8in x 1.670in OAL (16) from ARP represents a critical upgrade for serious engine builders and performance mechanics tackling high-heat applications. Header studs replace factory bolts at the cylinder head-to-manifold interface, where thermal cycling and vibration create fastener failure and exhaust leaks on modified or high-output engines. This 16-piece stainless steel kit is engineered for durability in environments where factory hardware simply cannot hold—turbocharged builds, naturally aspirated racing engines, and any platform subjected to sustained high exhaust temperatures.

ARP's proprietary stainless steel construction resists corrosion and maintains clamp load under extreme thermal stress far better than mild steel or cast-iron studs. The 3/8-inch diameter with 1.670-inch overall length (OAL) specification fits common small-block and mid-size engine platforms, providing the precise geometry needed for consistent torque application without cross-threading or galling. Stainless studs eliminate the seizing risk that plagues steel fasteners in high-temperature exhaust ports, allowing repeated disassembly for maintenance or tuning adjustments without risk of stripping threads. ARP's manufacturing tolerances ensure uniform load distribution across all 16 studs, preventing hot spots and localized gasket failure that lead to exhaust blow-by and power loss.

This kit suits any builder upgrading factory header bolts on modified engines, from street performance cars to dedicated race applications. Installation requires removing the header assembly and replacing factory bolts with these ARP studs—a straightforward procedure that pays dividends in reliability and repeatability. Always verify fitment against your specific engine platform and header design before purchase, as stud length and diameter must match your manifold bolt pattern precisely. For enthusiasts serious about maintaining air-tight header seals under boost or sustained RPM, ARP's stainless header stud kit delivers the fastening security that separates reliable builds from problematic ones.