ATI Serpentine SFI 18.1 Super Damper - 7.480 in OD - AC Pulley - Black - Internal Balance - GM LS-Series RS00100312 The block off plate is

The block off plate is powder-coated black for a visually appealing finish

Pinion and Carrier Bearing Kit - 12 Bolt GM Axle (Auto )Contains Pinion and Carrier Bearings

which produce higher exhaust temperatures

Also fits 1971-81 Camaro and 1973-88 Chevelle/Malibu

Competition Series

ATI Serpentine SFI 18.1 Super Damper - 7.480 in OD - AC Pulley - Black - Internal Balance - GM LS-Series RS00100312 The block off plate isThe patented ATI Super Damper is the only crankshaft damper designed exclusively for high performance Chevy engines. 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. Product Description: Harmonic