ARP manufactures premium grade bolt kits to facilitate installation of exhaust headers in both stainless steel or 8740 chrome moly steel. The Stainless 300 material is not affected by corrosion or extreme heat, making it ideal for the application. What’s more, the compact 12-point nut version lets you easily slip a socket close to the pipe. Each ARP bolt kit includes the specific number of parts for your application, plus premium-quality washers and hex or 12-point nuts, as required. The black oxide finished chrome moly bolts and stainless steel fasteners are nominally rated at 170,000 psi