Pressure Relief Valve BLOCK OFF
2003-2007 5.9L Dodge Cummins
All of the Common Rail Cummins feature a relief in the fuel rail
which is designed to relieve pressure once it sees roughly 25,000 PSI to
avoid damage to the stock injectors. However, most chips and
programmers are designed to deliver pressure higher than this, causing
the higher pressure fuel to not get to the injectors, losing power, and
eventually causing the failure of the stock pressure relief valve.
This simple device will block off the relief valve located on your fuel rail, ensuring that ALL rail pressure is delivered to the injectors, gaining power on the top end.