ARP Header Stud Kit - 3/8" x 1.670" - Hex - Black Oxide - SB Chevy 121025 6 AN Female O-Ring Female

6 AN Female O-Ring Female Outlet

2017-2019 GMC Sierra 3500 HD SLT DIESEL Crew Cab Pickup

it means that these are not suitable for open-top car racing or for karting

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ARP Header Stud Kit - 3/8" x 1.670" - Hex - Black Oxide - SB Chevy 121025 6 AN Female O-Ring FemaleARP header studs are manufactured with a unique nut starter nose that helps prevent cross threading. Black oxide bolts are available in either hex or 12 point head styles. Each ARP kit includes the correct number of fasteners for your application. 170, 000 psi tensile strength. ARPs product line contains thousands of part numbers, and has expanded to include virtually every fastener found in an engine and driveline. These range from quality high