Shop with ATI Diesel for the Hamilton Cams Flat Tappet Conversion Kit for your 2019 - 2024 6.7L Cummins diesel.
Fits: 2019–2024 Ram 2500/3500 6.7L Cummins Diesel
Replace the factory hydraulic roller camshaft and lifters in your 2019–2024 Ram 6.7L Cummins with the Hamilton Cams Flat Tappet Conversion Kit. Designed to address reliability concerns associated with the factory hydraulic roller valvetrain, this complete conversion kit provides a durable flat tappet alternative.
Beginning in 2019, Ram introduced a hydraulic roller valvetrain in its 6.7L Cummins engines. While hydraulic roller technology has been used throughout the automotive industry for decades, these components have experienced reliability concerns in certain heavy-duty diesel applications.
Hamilton Cams developed this conversion kit to replace the factory hydraulic roller components with a proven flat tappet design. The kit is designed for stock and mildly modified trucks and does not require additional tuning or modifications.
In addition to improved valvetrain reliability, users have reported quicker turbocharger spool-up, improved throttle response, better fuel economy, and reduced exhaust gas temperatures (EGTs).
Forged Steel Camshaft
The included 178/208 camshaft is manufactured from forged steel rather than machined bar stock.
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Improved Grain Structure: Forging creates a denser, more consistent grain structure throughout the camshaft.
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Increased Durability: The forging process produces a strengthened outer grain structure to support long-term reliability.
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Performance Design: Engineered to improve engine efficiency and response while maintaining compatibility with factory emissions equipment.
DLC-Coated Steel Tappets
The included steel tappets feature a Diamond-Like Carbon (DLC) coating designed to reduce friction and wear.
Each tappet undergoes gas carburizing and polishing to produce a hardened surface suitable for the DLC coating.
Proper lubrication, valve lash adjustment, and operating conditions are essential to maintaining the integrity of the coating.
Important Operating Requirements:
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Use 15W-40 engine oil during normal operating temperatures.
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Use 5W-40 oil in sub-zero temperatures.
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Avoid engine oils lacking sufficient zinc, phosphorus, and molybdenum additives.
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Maintain proper valve lash adjustments.
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Avoid excessive valve spring pressures and engine speeds above 4,000 RPM.
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Prevent metal contamination within the lubrication system.
Improper oil viscosity, excessive valve lash, valve float, or high engine speeds can compromise the oil film between the camshaft and tappets, potentially damaging the DLC coating.
This conversion is intended primarily for stock and mildly modified engines utilizing factory valve springs.
Heavy-Duty Pushrods
The upgraded pushrods are engineered to reduce deflection under high cylinder pressures.
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Over 3,500 lbs. Buckling Resistance: Compared to approximately 1,800 lbs. for factory pushrods.
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Improved Valvetrain Stability: Reduced pushrod flex helps maintain consistent valve timing.
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Heavy-Duty Construction: Designed for increased strength and durability under demanding operating conditions.
Upgraded Adjustable Rocker Arms
The kit includes upgraded adjustable rocker arms engineered for durability and precise valve operation.
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High-strength cast construction
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Gas-carburized ball and foot surfaces
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DLC-coated trunnions to reduce friction and galling
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Adjustable design for proper valve lash settings
Features
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178/208 Forged Steel Efficiency Camshaft
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Diamond-Like Carbon (DLC)-Coated Steel Tappets
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Heavy-Duty Pushrods With Over 3,500 lbs. Buckling Resistance
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Adjustable Rocker Arms With DLC-Coated Trunnions
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Replaces Factory Hydraulic Roller Camshaft and Lifters
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Designed for Improved Reliability and Durability
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Potential Improvements in Throttle Response, Turbo Spool-Up, Fuel Economy, and EGTs
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Compatible With Stock Trucks
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No Additional Tuning Required
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Emissions Certified for Applicable 2019–2024 Ram Diesel Trucks in 49 States (Excluding California)
Kit Includes
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(1) 178/208 Forged Steel Camshaft
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(1) Complete Set of DLC-Coated Steel Tappets
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(1) Complete Set of Heavy-Duty Pushrods
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(1) Set of Adjustable Rocker Arms With DLC-Coated Trunnions
Installation & Maintenance Notes
Valve Lash Specifications:
Valve lash must be adjusted after approximately five minutes of engine operation and rechecked following cylinder head retorquing, when applicable.
Hamilton Cams recommends Schaeffer 700 Series 15W-40 engine oil with an OEM Mopar oil filter following installation.
Proper engine oil selection and regular maintenance are critical for ensuring the longevity of the flat tappet valvetrain.
Important: This kit is designed for engines operating below 4,000 RPM with factory valve springs. Excessive RPM, high valve spring pressures, improper lubrication, or incorrect valve lash can result in premature component wear or DLC coating failure.
Shipping Restrictions: Cannot be shipped to California.
