1964-1967 Harmonic Balancer, 2 pc, All Pontiac V-8

Finest quality available. Tested by SFI laboratories at 12,000 RPM for one hour with absolutely no sign of failure.  Timing marks are TDC and 6 degrees BTDC for 1959-65 specifications.  Includes heat-treated hub, nodular damper,optional retainer, hub to damper bolts, and crank key