Header Stud Kit - 12pt. 3/8 x 1.670 OAL (12)

The ARP Header Stud Kit – 12pt. 3/8 x 1.670 OAL (12) is a purpose-built fastener set engineered for high-performance Small Block Chevy engine builds. These studs are manufactured from chromoly steel and finished in black oxide, delivering the strength and corrosion resistance needed for critical header applications where conventional bolts fall short. This 12-piece set contains everything required to secure a complete set of headers on Small Block Chevy platforms.

Each stud measures 3/8 inch in diameter with a 1.670 inch overall length, sized specifically to match header flange hole patterns on Small Block Chevy cylinder heads. The 12-point nut design provides superior grip and reduced fastener rounding during installation and removal—a significant advantage over standard 6-point fasteners in high-vibration engine environments. Chromoly construction offers tensile strength well above mild steel, reducing the risk of fastener failure under thermal cycling and vibration stress common in headers. The black oxide finish resists surface corrosion while maintaining the professional appearance expected in serious engine work.

This kit is designed for builders and engine shops assembling Small Block Chevy engines destined for street performance, racing, or restoration work. Header studs provide a critical advantage over bolts: they remain fixed in the head while nuts are torqued, eliminating the risk of bolt rotation stripping the threaded hole. ARP studs are recognized throughout the performance engine community for manufacturing precision and consistent quality. Whether building a 350, 383, or 406 Small Block variant, this stud set ensures proper header clamping force and long-term reliability.