This Rolair 5.5 HP Honda, 9.3 CFM@90PSI, 9 Gallon Twin Tank Compressor (4090HK17) features a 5 HP Honda engine, a single stage with a 9 gallon tank capacity and displaces 13.1 cubic feet with 8.7 free at 100 PSI. The 5.5 HP gas wheelbarrow has long been the top choice of framing and roofing contractors. In this class, the 4090HK17 stands out because of its high CFM output, portability and rugged build. Delivering 9.3 CFM at 90 PSI this unit incorporates the popular 5.5 HP Honda engine with automatic idle-down, for increased fuel efficiency, and an atmospheric unloading system to prevent oil consumption. Battle tested contractor tough? There's only one way to find out. Get it dirty, run it hot and don't let up - just like a contractor. That's how they're used, so that's how they're tested. Engines, pumps, motors, switches - every component of every Rolair compressor is battle-tested both in the field and at our Wisconsin factory. You have our guarantee that your Rolair compressor is ready to roll on day one, no excuses.