ARP Main Stud Kit - Hex Nuts - 2-Bolt Mains - Chromoly - Black Oxide - Ford FE-Series 10221 both 2/4wd with 143

both 2/4wd with 143

hardened valve seats

4-1/4 in Tall Hex Head Nuts

Typical wet boiling point: 399

ARP Main Stud Kit - Hex Nuts - 2-Bolt Mains - Chromoly - Black Oxide - Ford FE-Series 10221 both 2/4wd with 143ARPs 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 to exotic specialty hardware for Formula 1, IndyCar, IMSA, NASCAR and NHRA drag racing and marine applications. Since 1968, ARP is the fastener of champions and the world leader in fastener technology. Product Description: Main Stud Kit Hex Nuts 2