GX 390 Honda Engine | 4000 PSI | 4GPM The Vortexx Heavy Duty Series Pressure Washers prove that tough doesn’t have to be ugly. Vortexx has designed innovative features like cut-outs in the frame and oil drain holes to make servicing easy. The tough, all-aluminum construction means these units will easily hold their own. At the core is a powerful and dependable 200cc or 390cc Honda GX Engine mated to a commercial grade AR Triplex Plunger Pump.