ARP 120-1401 Header Bolt Kit 12-Point Stainless 300 14-Piece

The ARP 120-1401 Header Bolt Kit delivers professional-grade fastener performance for exhaust header installation. Manufactured from ARP's proprietary Stainless 300 material, these header bolts resist corrosion and extreme heat — making them ideally suited for the demanding thermal environment of exhaust applications.

Key Features:

• Stainless 300 construction — corrosion-resistant and impervious to extreme heat cycles
• 12-point head design — compact profile allows easy socket access even in tight header-to-head clearances
• 170,000 psi tensile strength — substantially stronger than standard Grade 8 hardware
• 14-piece kit — includes the correct quantity of fasteners for the application, plus premium-quality washers and 12-point nuts
• Nut-starter nose — unique stud tip design helps prevent cross-threading during installation
• Available in a special NASCAR-spec drilled configuration for safety wire use, providing the ultimate in header bolt security

ARP (Automotive Racing Products) engineers each fastener kit to meet the precise requirements of the application. The Stainless 300 alloy used in this kit is nominally rated at 170,000 psi tensile strength — far exceeding the strength of common Grade 8 bolts — while simultaneously offering superior resistance to the rust and corrosion that can plague standard steel fasteners in high-heat exhaust environments. The compact 12-point nut design is a practical advantage during installation, allowing a socket to slip in close to the pipe where clearance is limited.

Each kit contains 14 pieces, including all necessary hardware for a complete installation. ARP header fastener kits are a trusted upgrade for enthusiasts and professional builders seeking long-term reliability and precision-engineered clamping force at the exhaust manifold or header flange.