Flat Tappet Camshaft Kit

The Hamilton Cams flat tappet conversion kit™ offers a robust solution for upgrading the valvetrain in specific Cummins engines, replacing the original hydraulic roller lifters and camshaft with a more durable flat tappet system. This kit is meticulously engineered with forged steel camshafts featuring a tighter grain structure for enhanced longevity, DLC-coated steel tappets for dramatically reduced friction and wear, heavy-duty pushrods with a 3500+ lbs buckling force to minimize deflection, and upgraded rocker arms with DLC-coated trunnions to reduce galling. The camshafts boast a 178° intake duration at 0.050" lift and a 208° exhaust duration at 0.050" lift, with lifts of 0.270" for intake and 0.310" for exhaust. The tappets undergo a gas carburizing and polishing process, followed by a Diamond-Like Carbon (DLC) coating for superior wear resistance. Proper installation and maintenance are crucial for the longevity of this kit. Specific oil recommendations must be followed, including Valvoline Premium Blue 15W-40 for normal temperatures or 5W-40 for sub-zero Fahrenheit temperatures, or Schaeffer 700 Series 15W-40/5W-40. The use of a Fleetguard Filter LF16035 Stratapore is also recommended. Valve lash settings are critical: 0.010″ for intake and 0.020″ for exhaust, which must be re-checked after head retorquing. High RPMs (above 4,000) and high spring pressures are discouraged for longevity due to insufficient film strength in emission-compliant oils. This kit is SEMA-certified for 49-state compliance and is emission certified for all Ram 2019-2024 2500 and 3500 diesels not in California. An important fitment notice states that if the engine block or cylinder head has been surfaced, customers must call for verification to ensure proper kit fitment. Users have reported increases in spool-up, throttle response, fuel economy gains, and EGT reductions on stock vehicles with OEM tuning and all emission equipment present.