ARP 100-1209 Header Bolt Kit 12-Point 3/8-16 x 1.000 (12-Pack)

The ARP 100-1209 header bolt kit delivers professional-grade fastening solutions for exhaust header installations. This 12-piece kit features premium 12-point head bolts designed to provide superior grip and easy access in tight engine bay configurations.

Key Features:

• 12-point head design allows socket engagement at more angles for improved accessibility around exhaust pipes
• Black oxide chrome moly construction rated at 170,000 psi tensile strength—substantially stronger than Grade 8 hardware
• Includes 12 precision-manufactured bolts with premium-quality washers
• Engineered specifically for exhaust header mounting applications
• Resistant to extreme heat cycling and vibration loosening

ARP (Automotive Racing Products) has been the leading manufacturer of high-performance fasteners for racing and performance applications for decades. Each bolt is manufactured to exacting tolerances and undergoes rigorous quality control to ensure consistent clamping force and reliability under the most demanding conditions. The 12-point head configuration provides 30% more contact points than standard 6-point bolts, reducing the risk of rounding while allowing easier installation in confined spaces typical of header installations.