Edelbrocks high performance hydraulic roller lifters for small-block Chevy, W-series Chevy, big-block Chevy, big-block Chrysler, small-block Ford and FE Ford are the perfect match for street and high performance applications. With unsurpassed tolerance capable of high rpm power, these precision self-aligning retro-fit hydraulic roller lifters are designed for use in early model non-roller engine blocks originally equipped with conventional lifters. Sold in complete sets of 16.