( C/C-850-16 ) - ONE SET ( 16 ) Hydraulic Roller Lifter FOR SMALL BLOCK CHEVY. HYDRAULIC ROLLER LIFTER FOR 305/350 BLOCKS ORIGINALY EQUIPPED WITH HYDRAULIC ROLLER CAMS. 1989 TO 2000. Recommended as a performance replacement for stock roller lifters or for use when using a Comp Cams Performance Hydraulic Roller camshaft.------------------- For engines originally equipped with a roller cam. Uses OE lifter guides and retainers.