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USD 325
Part #: HC07-S-003

Hamilton Cams 07-S-003 Valve Springs

1998.5-2018 Dodge Ram 5.9L/6.7L Cummins
Part #: HC07-S-003
★★★★★ ★★★★★ 4 Reviews
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Increase performance in the valvetrain of your 1998.5-2018 Dodge 5.9L / 6.7L Cummins with the Hamilton Cams 07-S-003 Valve Springs. Stock springs have 78-82lbs of pressure seat pressure on average at 1.380". If you are over 50psi (boost or drive pressure) and 3,800 rpm, stock springs do not fully control the valvetrain. This allows a few negative things to happen. First, valve float, which can cause serious damage to the valvetrain. Second, intake and exhaust valves can be blown open by boost and exhaust drive pressure which allows reversion. Reversion can hurt your power potential by allowing exhaust gasses to enter the cylinder on the intake stroke. Inert gasses in the exhaust, when reintroduced into the cylinder shield the fuel particles from oxygen in the cylinder.

This does a few things that negatively affect power. It increases the time delay from start of injection to start of combustion, it decreases the maximum pressure and maximum temperature reached in the cylinder and it increases the total time needed to completely burn the available fuel. Correct valve spring pressure is a very important piece of power production. If you are running a tuner on an otherwise stock truck with a VGT charger, based on exhaust drive pressure, you need these.

Hamilton Cams suggests these springs if you are over 50lbs. of boost(or drive pressure) or over 3800 rpm or when running aftermarket camshafts. Hamilton has slightly lowered the pressure on this springs from 110# to 103#. If you are running over 4,500 rpm with a large cam, they suggest going with 103# springs with different processing for better longevity in extreme applications as well as their light-weight 4130 or titanium retainers. Retainers not included.

  • 103# Spring 
  • Complete Set
  • Works For Over 50lbs Of Boost
Shipping Restrictions Apply shipping restriction icon This product can not be shipped to these states: CA

Vehicle Applications

1998.5 Dodge 5.9L 24V Cummins
1999 Dodge 5.9L 24V Cummins
2000 Dodge 5.9L 24V Cummins
2001 Dodge 5.9L 24V Cummins
2002 Dodge 5.9L 24V Cummins
2003 Dodge 5.9L 24V Cummins
2004 Dodge 5.9L 24V Cummins
2004.5 Dodge 5.9L 24V Cummins
2005 Dodge 5.9L 24V Cummins
2006 Dodge 5.9L 24V Cummins
2007 Dodge 5.9L 24V Cummins
2007.5 Dodge 6.7L 24V Cummins
2008 Dodge 6.7L 24V Cummins
2009 Dodge 6.7L 24V Cummins
2010 Ram 6.7L 24V Cummins
2011 Ram 6.7L 24V Cummins
2012 Ram 6.7L 24V Cummins
2013 Ram 6.7L 24V Cummins
2014 Ram 6.7L 24V Cummins
2015 Ram 6.7L 24V Cummins
2016 Ram 6.7L 24V Cummins
2017 Ram 6.7L 24V Cummins
2018 Ram 6.7L 24V Cummins


  • MFG. Number 07-S-003
  • Manufacturer Name Hamilton Cams
  • Shipping Weight 5.00 lb.
  • Shipping Length 6 in.
  • Shipping Width 12 in.
  • Shipping Height 3 in.
  • Fuel Type Diesel
  • UPC 857340008711
  • Prop 65 Prop 65 WarningWARNING: Cancer & Reproductive Harm -
  • Internal L22.00R7.00


★★★★★ ★★★★★
5.0/5 Stars out of 4 Reviews
Verified Buyer
Go-To Springs
Happy with the performance this springs allow you to have and how XDP makes the acquisition effortless and speedy.
Verified Buyer
Cheap insurance
I bought these valve springs for future upgrades in mind. I had the head stipped down so these were a no brainer. Install was fairly straight forward, and the quality is great. Order#1372359
Verified Buyer
Needed for high rpm, big boost, exhaust brakes
Best springs for big turbos/compounds. Needed to prevent valve float and for higher rpms. Order number 1054071
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Questions and Answers

Does this product come as a complete set?
View Staff Answer 
Yes, this is a complete set of valve springs.
Will these be ok for stock cam? Never plan on upgrading cam. But do plan on going over 50psi. Will also be purchasing upgraded push rods but wanted to make sure these won't ruin my stock cam. 1999 5.9. Didn't see a selection for lighter duty but still above stock.
View Staff Answer 

The HAMILTON CAMS 07-S-003 VALVE SPRINGS would be a great option when running over 50 pounds of boost pressure. These valve springs do not require an aftermarket camshaft for installation.

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