Exhaust Stud Kit - 12pt. KB Hemi

The ARP Exhaust Stud Kit for 12-point KB Hemi engines (SKU ARP245-1301) is a premium fastening solution designed for serious Mopar V8 builders and performance enthusiasts. This set of 16 header studs delivers the clamping consistency and reliability required for high-heat exhaust manifold applications where standard fasteners fall short under thermal cycling and vibration.

Each stud measures 3/8-inch in diameter and is manufactured from chromoly steel with black oxide finish—a material pairing that resists corrosion while maintaining superior strength at elevated temperatures. The 12-point nut design provides precise torque control and reduces the risk of fastener slip during installation and engine operation. Studs are available in two lengths (1.67 and 2 inches) to accommodate different Hemi head configurations and port geometry. Chromoly construction offers higher tensile strength than standard steel, critical for applications where exhaust headers experience repeated thermal stress cycling from cold starts through sustained high-RPM running.

ARP studs are the standard specification for Mopar drag racing, street performance, and engine rebuild shops because they eliminate fastener stretch and prevent header separation. This kit is essential for anyone rebuilding a KB Hemi or upgrading to high-performance headers. Whether you're assembling a race engine, restoring a classic, or upgrading a street machine, proper exhaust manifold fastening directly impacts long-term reliability and header seal integrity.

Weighing 1.1 lbs and backed by ARP's reputation for precision fastening, this kit represents a foundational upgrade for any serious Hemi application. The black oxide finish protects against rust in typical engine bay environments while the chromoly material withstands the thermal demands specific to Mopar large-displacement engines.