Hamilton Cams

Hamilton Cams 103 lb 24-Valve Valve Spring Set 98-18 5.9L 6.7L Cummins

SKU: 07-s-003 UPC: 857340008711
In stock - 2 items available
$349.00

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This product is selected for proper fitment and compatibility with the listed engine application. Our team is available to assist with fitment questions, installation considerations, and supporting components to ensure a smooth install and reliable performance.

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Compliance & Restrictions
California Proposition 65 (Prop 65)
WARNING: This product can expose you to chemicals which is known to the State of California to cause cancer and/or reproductive harm. For more information, visit www.P65Warnings.ca.gov.
CARB / California Emissions Compliance
This item may be restricted in California and other regions with emissions regulations. If applicable, it is intended for competition/off-road use only unless otherwise stated. It is the customer’s responsibility to confirm local compliance before purchase. Orders shipping to restricted areas may be canceled.

Once a 24-valve is seeing more than about 35 psi of boost or drive pressure, or turning past 3,800 RPM, the factory springs stop controlling the valvetrain. At 80 lbs of seat pressure at 1.380 inches they let valves get blown open under boost, which pulls exhaust gas back into the cylinder on the intake stroke and slows combustion. Above 3,800 RPM the same lack of pressure allows valve float, and valve float is what fractures cast tappets.

Key Features

  • 103 lb seat pressure against 80 lbs for the factory spring
  • Controls the valvetrain to 4,500 RPM and 80 lbs of boost and drive pressure
  • Prevents valves being forced open under high boost, and the reversion that follows
  • Higher seat pressure with moderate nose pressure, so valvetrain control does not come at the cost of cam and tappet wear

Fitment

  • 1998.5-2007 Dodge Ram 5.9L Cummins 24-valve
  • 2007.5-2018 Ram 6.7L Cummins

Notes

  • Tool steel retainers are not included and are sold separately
  • Beyond 4,500 RPM, step up to the Hamilton Cams 110 lb competition springs
  • Hamilton Cams warranties camshafts only when installed with Hamilton Cams tappets and valve springs.

Product Details

  • Brand: Hamilton Cams
  • Manufacturer Part Number: 07-s-003
  • UPC: 857340008711

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