Steel Lifters/Tappets

1.45" DLC-Coated Steel Tappets

Hamilton Cams steel tappets built for engines running 110 lb or heavier valve springs at sustained high rpm. The 1.45" face is gas carburized, polished and finished with a Diamond-Like Carbon coating that cuts friction and resists the scuffing that ends a flat-tappet valvetrain early.

Key Features

• DLC coating — an ultra-hard, low-friction surface that holds up where uncoated steel galls
• 1.45" face — more contact area with the lobe, better lobe life on today’s low-zinc diesel oils
• Steel construction — stable under 110 lb and heavier seat pressures
• Consistent lift — less deflection, so cam timing stays where it was set

Required Setup

These tappets must be run with a steel camshaft. Pairing steel tappets with a cast cam, or the reverse, wears both parts out quickly.

• Steel camshaft required
• Diesel oil with adequate zinc, phosphorus and molybdenum — thin, low-additive oils do not build the film a flat tappet needs
• Correct valve lash; valve float damages the DLC layer

Fitment

1989–2007 Dodge Ram 5.9L Cummins and 2007.5–2018 Ram 6.7L Cummins flat-tappet builds using a compatible steel camshaft.

Fitment Table

Frequently Bought Together

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