Package contains (16) GM #17122490 lifters. For engines originally equipped with a roller cam. Uses OEM lifter guides and retainers.
Chevrolet Performance Hydraulic Roller Lifters
Chevrolet Performance hydraulic roller lifters are designed as direct replacements for your engine. These lifters were designed for use by GM to be used in performance engine builds and incorporate improved valving to allow higher rpm capability- what more can you ask for?