HD High Boost Valve Spring Set 1998.5-2022 Dodge 5.9L/6.7L Cummins XDP and both fuel rails must

and both fuel rails must be returned for full core credit

oil cooler

The XDP head studs are constructed from high-quality 8740 Chrome Moly that also includes a proprietary element added for superior strength and durability

6L Duramax LML back on the road

XDP fuel injectors are remanufactured with only the highest quality materials and are designed to provide you with a long service life

HD High Boost Valve Spring Set 1998.5-2022 Dodge 5.9L/6.7L Cummins XDP and both fuel rails mustControl 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