This COMP Cams retro-fit hydraulic roller lifter pair provides a direct way to convert early flat‑tappet valve trains to roller lifters. The BV69-style lifter profile is intended for early blocks originally equipped with flat tappet cams and offers the basic mechanical change needed to improve valvetrain compatibility when converting to roller cam profiles.
COMP Cams Lifters BV69 Retro-Fit Hydraulic Roller