BXD3025G Pressure Washer Pump 2500PSI, 2.8GPM Comet Comet BXD Series axial plunger pump with adjustable unloader & chemical injection Direct Drive with 4 bolt Gas Flange, 3 - 6.5 HP horizontal engines Max. Volume: 2.8 GPM Max. Discharge Pressure: 2,500 PSI Fits most horizontal engines with a 3/4(in) straight solid shaft with keyway