This ARP 100-1111 SBC High Performance Header Bolt Kit comes with 180,000 PSI Black Oxide hex head bolts. This is up to 5X stronger than stock! They have a 3/8-16 in thread and a 1.000" Under Head Length. Kits come complete with washers. Sold as a set of 12. ARP 100-1111 SBC Header Bolt Kit Fits: Small Block Chevrolet Engines ARP manufactures a variety of premium grade bolt and stud kits to facilitate installation of exhaust headers including the popular stainless stud kit with 12-point nuts. The ARP Stainless material is not affected by corrosion or extreme heat, making it ideal for the application. What’s more, the compact 12-point nut lets you easily slip a socket close to the pipe. ARP manufactures their studs with a unique nut-starter nose that helps prevent cross-threading. Studs and bolts come either black oxide chrome moly or polished ARP Stainless, both nominally rated at 180,000 psi tensile strength, substantially stronger than Grade 8 hardware. Specially drilled “NASCAR” models are available for those who wish to safety wire their header bolts to prevent loosening.
![ARP SBCHVYHEX HDER BOLT KIT [100-1111]](https://cdn.shopify.com/s/files/1/0779/8607/0831/files/ImageServerAPI_d935a248-de9c-4de0-a834-3eb21c374492.jpg?v=1777009343&width=480)
