ARP 6 Point Header Studs have a 170,000 psi tensile strength with a unique nut-starter nose that helps prevent cross threading and aids installation. This exhaust kit works with all OEM cast iron cylinder heads and our new aluminum cylinder head, and comes with black oxide studs, washers, and 6 point steel hex nuts. Stainlesss steel studs are also available (see options) 

Kit includes: 11 studs, 11 washers, and 11 hex nuts (6 point).