Edelbrock' s high performance hydraulic roller lifters for 1987 and later small-block Chevys are the perfect match for Edelbrock Rollin' Thunder hydraulic roller cams. They are a drop-in replacement for 1987 and later blocks that accept factory roller camshafts. These precision hydraulic roller lifters feature tight ID tolerances that allow for better control at higher RPM and a micro finish OD for reduced friction.