ARP manufactures premium grade exhaust header bolts in both stainless steel or 8740 chrome moly steel. The Stainless material is not affected by corrosion or extreme heat, making it ideal for the application. What?s more, the compact head design lets you easily slip a socket close to the header pipe. Each ARP bolt kit includes the specific number of parts for your application plus premium-quality washers as required. The black oxide finished chrome moly bolts and stainless steel fasteners are nominally rated at 180,000 psi tensile strength. Specially drilled ?NASCAR? models available for those who wish to safety wire their header bolts to prevent loosening.