ATI PERFORMANCE SBC 6.325 SFI Harmonic Damper Internal Balance 917781U

ATI PERFORMANCE Harmonic Balancer - Super Damper - Undersized - 6.325 in OD - SFI-18.1 - Internal Balance - Steel - Black Paint - Small Block Chevy - Each.
WITH UNDERSIZED CRANK HUB BORE ID 1.24