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325
Part #: HC07-S-003
Hamilton Cams 07-S-003 Valve Springs
★★★★★
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Description
Increase performance in the valvetrain of your 1998.5-2018 Dodge 5.9L / 6.7L Diesel with the Hamilton Cams 07-S-003 Valve Springs. Stock 24v springs have 78-82lbs of seat pressure at 1.380″. If you are over 35psi (boost or drive pressure), stock springs do not fully control the valvetrain. 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. Hamilton springs solve this problem.
Nose pressure has been lowered from 220lb to 180lb recently. Watch out for others that have nose pressures over 250lb. Your cam can have a shorter life with high rate springs. These springs are great to 4500 rpm. Over that the #110 springs are necessary. Over 4500 rpm with #103 springs you can see broken or cracked retainers due to float and harsh valve actuation.
Nose pressure has been lowered from 220lb to 180lb recently. Watch out for others that have nose pressures over 250lb. Your cam can have a shorter life with high rate springs. These springs are great to 4500 rpm. Over that the #110 springs are necessary. Over 4500 rpm with #103 springs you can see broken or cracked retainers due to float and harsh valve actuation.
Features:
- 103# Spring
- Complete Set
- Good To 4,500 RPM
- Ideal For Over 35lbs Of Boost
Shipping Restrictions Apply 
This product can not be shipped to these states/provinces: CA
This product can not be shipped to these states/provinces: CA
Disclaimer: XDP is in no way affiliated with Cummins or any of its subsidiaries or related companies, and that Cummins has not authorized the sale of any of XDP's parts, and has not tested or approved any of XDP’s parts for use in genuine Cummins brand products.
Specifications
- MPN 07-S-003
- SKU HC07-S-003
- GTIN 857340008711
- ID 18126
- Manufacturer Name Hamilton Cams
- Shipping Weight 5.00 lb.
- Shipping Length 6 in.
- Shipping Width 12 in.
- Shipping Height 3 in.
- Fuel Type Diesel
-
Prop 65
WARNING: Cancer & Reproductive Harm - P65Warnings.ca.gov
- Internal L14R15
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Reviews
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★★★★★
5.0/5 Stars out of 4 Reviews
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4
Rosco (Washington) | October 4th, 2022
Happy with the performance this springs allow you to have and how XDP makes the acquisition effortless and speedy.
Evan (Littleton, CO) | April 6th, 2021
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
Eddie L (Cedarburg wi) | October 16th, 2019
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
Answer
Yes, this is a complete set of valve springs.
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
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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