High Energy Hydraulic Roller Lifters Chevrolet Small block 305 and 350. For use in blocks originally equipped with hydraulic Roller cam 1987 to present and GenIII/LS1 LS2 and LS6. These lifters are for use with the newly designed hydraulic Roller Cam Series from COMP Cams or as a performance replacement for stock hydraulic Roller lifters. You must be certain that the lifter is correct for the type of block used.
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