This Comet Pump Pressure Washer Pump provides a fast changeover, even in the field. Pre-plumbed and pre-tested. Fits 4-bolt engine face plates. Bolts not included; use existing bolts from old pump to install new pump. Replaces Item# A157754 HP: 5-6.5, GPM: 2.5, Application: Pressure washer pump, Shaft Diameter (in.): 3/4, Fuel Type: Gasoline, Max. PSI: 2,700