Shop with Blessed Performance for the BD-Power Fuel Plug for your 2003-2005 Dodge 5.9L Cummins designed to block block-off your factory pressure relief valve found on your 5.9L Cummins. The BD-Power Fuel Plug will allow you to maintain consistent rail pressure and is especially beneficial to higher horsepower trucks.
HIGHLIGHTS:
- Improves Engine Starting
- Easily Replaces Stock Valve.
- Seals In 30,000 PSI Rail Pressure
Prop 65 
WARNING: Cancer & Reproductive Harm - P65Warnings.ca.gov