http://tinyurl.com/lwyaefjBXD2527G Pressure Washer Pump 2700PSI, 2.4GPM CometProduct Review Click on the link for more reviewsComet BXD Series axial plunger pump with adjustable unloader & chemical injectionDirect Drive with 4 bolt Gas Flange, 3 - 6.5 HP horizontal enginesMax. Volume: 2.4 GPMMax. Discharge Pressure: 2,700 PSIFits most horizontal engines with a 3/4(in) straight solid shaft with keyway