Direct Drive EP1313G8 Replacement Pump Fully Plumbed and ready to go - 4 bolts off - 4 bolts on Comes with unloader, pressure relief valve, pressure washer hose plug, and garden hose inlet w/ filter 1-Inch Hollow Shaft w/ Gas Flange Provides a smooth liquid flow at 3400 RPM 15 oz. crankcase with one-piece plunger design eliminates water entering crankcase Offers Maximum 4000 PSI & 4 GPM Heavy-duty advanced forged brass manifold Solid ceramic plungers with dust protection chamber Rated for a maximum 125 PSI and 165-degree temperature Pulsar EZ Unloader.