Crower 66931LW980-1 Features:

Crower 66931LW980-1 solid lightweight Coolface lifter for Mopar LA, Mopar B, and HEMI V8 mechanical flat tappet valvetrains 0.903 in. outside diameter, 1.490 in. seat height, and lightweight 78 g design for reduced valvetrain mass at high rpm Precision-machined 0.024 in. oil-metering port on the lifter face delivers at least 80% more oil to cam and lifter contact areas Flows up to 50% more oil to the top end to help cool rocker and spring assemblies without significant oil pressure loss

Solid Lightweight Coolfac .903 In. Mechanical Flat-tappet Lifters 78 Features:

• Mechanical flat-tappet design for Mopar LA, Mopar B and HEMI V8 applications, built for stable valvetrain control in demanding high-rpm performance use
• 0.903 in. OD and 1.490 in. seat height for correct fitment, with a solid lightweight 78 g construction that helps reduce valvetrain mass
• Precision-machined 0.024 in. face oil-metering port delivers at least 80% more lobe lubrication to help prevent cam and lifter wear under heavy spring pressure
• Flows up to 50% more oil to the top end to cool rocker and spring assemblies, helping dissipate heat and extend valvetrain component life
• 55-59RC hard wear surface with precision-ground radius face and specialized finish for quicker break-in and consistent flat-tappet contact