ATI Transmission Drum - High Gear - Aluminum - TH400 H764009S Larger-than-stock studs require redrilling of

Larger-than-stock studs require redrilling of stock flanges

1985-1987 Oldsmobile Cutlass

Size I is 16"x16" and size II is 20"x18

Systems use the highest quality materials including 4130 chrome moly steel hardware

Natural / Black

ATI Transmission Drum - High Gear - Aluminum - TH400 H764009S Larger-than-stock studs require redrilling ofProduct Description: Transmission Drum 6 Clutch High Gear Aluminum Natural TH400 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.