New ADJUSTABLE P7100 overflow return pressure regulator valve. Fits Dodge Ram with Cummins, - 12 valve, 1994-1998.5. ADJUST YOUR FUEL PRESSURE WITHOUT STRETCHING SPRINGS. BULLETPROOF DESIGN ELIMINATES HAMMERED SEATS. CURE FOR HARD STARTING AND LOW POWER. BUILT TO HANDLE WVO AND BIODIESEL. LEAK PROOF CHECK VALVE PREVENTS BACK FLOW TO TANK. PRECISE FUEL PRESSURE FOR THE BOSCH P7100 INJECTION PUMP. VALVE IS PRESET AT FACTORY TO 30 TO 32 PSI