This General Pump Pressure Washer Pump provides a fast changeover even in the field. Pre-plumbed and pre-tested. Fit 4-bolt engine face plates. Bolts not included; use existing bolts from old pump to install new pump. Fuel Type: Gasoline, GPM: 4.0, HP: 11, Max. PSI: 3,000, Shaft Diameter (in.): 1, Application: Pressure washer pump