Pure Diesel Power, your number 1 diesel performance parts source!

Help Desk Software

Give us a call. 715-254-1833

Save 11%
Dodge 24v Commonrail Cummins Heavy Duty 103LB Hamilton Valve Springs

98.5-15 Dodge 5.9L/6.7L Cummins Heavy Duty 103LB Hamilton Valve Springs

List price: $449.00  


You save: $50.00 (11%)

Dodge 5.9L & 6.7L 24 Valve Commonrail Cummins Heavy Duty Valve Springs

By Hamilton Diesel.

Good for up to 4500 RPM!

Heavy Duty Valve Springs 1998.5-2011+  24 Valve Cummins - 110 pressure

Features include:

  • Beehive design to reduce mass on the top part of the spring with the most linear motion
  • Ovate wire to handle high lift cams without coil bind
  • Triple shot peened to reduce stresses and promote long life
  • Nitrided finish to prevent corrosion
  • Will handle cams with over .500" valve lift


Complete set of springs

Stock springs have 78-82lbs of pressure seat pressure on average at 1.380". If you are over 35psi(boost or drive presure) 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 re-introduced 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.

We recently slightly lowered the pressure on our springs from 110lb to 103lb. Nose pressure has been lowered from 220lb to 180lb. Watch out for other companies that have nose pressures over 250lb. Your cam will have a shorter life with 250lbx2 (500lb) versus 180lbx2 (360lb)over the nose of the cam. Don't just ask what seat pressure is when you are shopping for springs, ask what the pressure is on the nose(1.031" with OEM cams or .958" with the 188-220)

If you are running over 4,500 rpm with a large cam, we suggest going with our 103lb springs with dufferent heat treat and shot peen, for better longevity in extreme applications, as well as our light-weight 4130 or titanium retainers.

No posts found

Customers Also Bought