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

Constructed with high-strength alloy steel to withstand extreme high fuel pressures, and chrome plated for corrosion resistance. The M20 port at top of the block will take the factory fuel pressure relief 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/high fuel pressure conditions.