ARP 434-1102 Header Bolt Kit LS Small Block Chevy M8 x 1.25 12-Pack

ARP 434-1102 header bolt kit provides premium-grade fasteners specifically engineered for secure exhaust header installation on GM LS-series small block engines. These precision-manufactured bolts ensure reliable clamping force and resistance to thermal cycling in high-temperature exhaust applications.

Key Features:

• M8 x 1.25 thread size with 1.181-inch length optimized for LS engine header flanges
• Hex head design for standard socket installation
• 170,000 PSI tensile strength rating for superior clamping force
• Black oxide finish on 8740 chrome moly steel resists corrosion
• Designed for 1/4-inch wide header flanges common on aftermarket LS headers
• Complete kit includes 12 bolts with premium washers

This kit fits GM Generation III/IV LS small block engines including LS1, LS2, LS3, LS6, LS7, and variants. ARP's precision manufacturing ensures consistent thread engagement and proper torque retention even under extreme exhaust manifold temperatures. The black oxide coating provides corrosion resistance while the chrome moly construction delivers strength far exceeding OEM fasteners.