ATI Super Damper SFI 18.1 Harmonic Balancer - 7.48 in OD - Black - Internal Balance - GM LS-Series R07C152XL washer and nut that seals

washer and nut that seals against the inside of the wheel

540 lb/in Spring Rate

Available with 58cc or 72cc combustion chamber volume

no more manual override switch

ATI Super Damper SFI 18.1 Harmonic Balancer - 7.48 in OD - Black - Internal Balance - GM LS-Series R07C152XL washer and nut that sealsProduct Description: Harmonic Balancer Super Damper 7. 48 in OD SFI 18. 1 Steel Black Oxide Internal Balance GM LS Series Sold Individually ATI Performance Products is a company founded on innovation, precision and service. ATI harmonic Super Dampers add horsepower and torque to race, street and truck engines. ATI Performance Products is the creation of over 40 years of Transmission and performance component manufacturing and racing experience.