ARP Harmonic Balancer Bolt - 1/2-20 in Thread - 1.550 in Long - 13/16 in 12 Point Head - Chromoly - Black Oxide - Big Block Chevy Water Pumps Plates are 1/2" thick and

Plates are 1/2" thick and can also be used when setting bump steer or checking axle tubes for straightness

As-Cast Runner Cross-Sectional Area - Tapered 4

540 in Bolt Centers

reads from 0-100

These springs will your 1964-1972 GM A-body

ARP Harmonic Balancer Bolt - 1/2-20 in Thread - 1.550 in Long - 13/16 in 12 Point Head - Chromoly - Black Oxide - Big Block Chevy Water Pumps Plates are 1/2" thick andARPs 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: Harmonic Balancer Bolt 1 2