Aluminum Roller Big-Block Rocker Arm for 7/16" StudsChevrolet Performance aluminum roller rocker arms have bearings and fulcrums with an extra-wide design for improved load distribution. The rockers are lubricated with pressurized oil. The rockers have a 1.7:1 ratio for 7/16" studs. The roller-tip axle is made from 4130 steel and the roller tip is machined and ground from 8620 steel.
NOTE: Not for use with production-height valve covers.
•Description: Aluminum Roller Rocker Arm Set, 1.7:1 Ratio
•Tech Notes: Single Replacement 1.7 Roller Rocker Arm. Used on 572-cubic-inch Big-Block engines. Use P/N 19244484 for a full kit.