ARP Stainless Steel Header Bolt Kit - SB Chevy - 3/8" Diameter, .750" Length - Hex Head - (12 Pack) 23-FLT-NFO-S 3 and the new FIA

3 and the new FIA 8856-2018 homologation standard

More area and smoother transitions from the inlet to the outlet

At low demand

With lightweight 8mm diameter stem

ARP Stainless Steel Header Bolt Kit - SB Chevy - 3/8" Diameter, .750" Length - Hex Head - (12 Pack) 23-FLT-NFO-S 3 and the new FIAChoose from ARP Black Oxide or 300 stainless steel in hex or 12 pt. Heads. The 300 stainless material is not affected by extreme heat, eliminating the possibility of retempering due to exhaust temperature cycles. Rated 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 performance OEM replacement parts