ATI Super Damper Harmonic Balancer - 7.425" OD - SFI 18.1 - Steel - Black - External Balance - GM Duramax 2011-20 YA0803ABP or reverse seam as they

or reverse seam as they are sometimes called

2015) against 17 competitors wideband UEGO Air/Fuel Controllers

Ultra-flat anti-rub seams

These rotors are also available in a complete conversion kit

ATI Super Damper Harmonic Balancer - 7.425" OD - SFI 18.1 - Steel - Black - External Balance - GM Duramax 2011-20 YA0803ABP or reverse seam as theyProduct Description: Harmonic Balancer Super Damper 7. 425 in OD SFI 18. 1 Steel Black Oxide External Balance GM Duramax 2011 20 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.