Control the valvetrain in your modified 1998.5-2022 Dodge 5.9L Cummins with the XDP HD High Boost Valve Spring Set XD390. The XD390 Valve Spring Kit is designed to help eliminate valve float due to elevated cylinder pressures and higher boost levels.
Common upgrades like aftermarket tuning and fueling and turbo upgrades can cause valve float that results in severe engine damage. Intake valves can also be blown open from added boost levels and exhaust drive pressure which allows reversion. Reversion is when exhaust gasses enter cylinder on the intake stroke, another condition that can hurt your power potential.
The XD390 Valve Spring Set is ideal for the enthusiast that is running an aftermarket camshaft, upgraded or compound turbochargers, and fueling upgrades. These springs are ready to install using your factory retainers and locks. The XD390 Valve Springs have a reduced OD and will fit all 1998.5-2002 cylinder heads regardless of the casting inconsistencies.
Features:
- Performance Valve Spring Kit
- Essential For Elevated Boost Levels (50 and up lbs)
Specifications:
- Installed Height: 1.340 inch
- Installed Pressure: 108lbs
- 192lbs at .920 inch
- Coil Bind: .800 inch
Returns Policy
If you would like to return or refund an item please use the contact page on our website and write us a message. You can also email us at info@classictomodernparts.com or phone 860-810-4654. Customer pays return shipping. All returns must include all items from your purchase or a possible restocking fee may apply. If possible please put them in the same box that arrived to you. Some circumstances in which credit will not be issued but not limited to: Product has been installed and/or used, product has been damaged from an attempt to be installed and/or used, product is shipped back without original box, product serial number does not match that of which was original shipped to buyer, product is deemed not re-saleable by Classic To Modern Parts due to customers own actions in dealing with the product.- Choosing a selection results in a full page refresh.