2004.5-2010 GM 6.6L Duramax Dual Fueler Pressure Regulator Block

Constructed with high-strength alloy steel to withstand extreme high fuel pressures, and chrome plated for corrosion resistance. The M-20 port at top of the block will take the factory fuel pressure regulating valve mounted at the end of the fuel rail for pressure release. It is also compatible with the PPE Race Fuel Valve which helps maintain fuel rail pressure during high engine load conditions.