Arp Valve Cover Fastener - Bolt - 1/4-20 in Thread - 12 Point - Stainless - Polished - Small Block Ford - Set of 16-454-7502--Notes: use w/Ford M-6582-Z351 & M-6582-Z351B Valve Covers State Restrictions- Canada Restriction-NO -Emission Warnings--NO Truck Freight ---NO