ARP 18 mm x 1.5" Thread Harmonic Balancer Bolt 2.750" Long 27 mm 12 Point Head Chromoly - Black Oxide TK12314 5 in Bolt Holes

5 in Bolt Holes

than 1 piece designs

This is the pump that started it all

Square Keys

1979-1986 GMC C1500 Suburban

ARP 18 mm x 1.5" Thread Harmonic Balancer Bolt 2.750" Long 27 mm 12 Point Head Chromoly - Black Oxide TK12314 5 in Bolt HolesARPs 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 18