Home Commercial Pressure Washers STIHL RB 400 DIRT BOSS Pressure Washer STIHL RB 400 DIRT BOSS Pressure Washer$701.40 Gas pressure washer rated at 2,700 PSI and 2.7 GPM. STIHL RB 400 DIRT BOSS Pressure Washer quantity Add to cart Category: Commercial Pressure Washers Description Gas pressure washer rated at 2,700 PSI and 2.7 GPM. Brand: STIHL. Model: RB 400. Related products STIHL RB 200 Gas Pressure Washer $526.05 Commercial Pressure Washers STIHL RB 800 Gas Pressure Washer $1,437.88 Commercial Pressure Washers STIHL RB 600 Gas Pressure Washer $1,017.04 Commercial Pressure Washers