- NorthStar Gas-Powered Air Compressor - Honda GX270 OHV Engine, 8-Gallon Twin Tank, 14.9 CFM @ 90 PSI Honda GX270 OHV engine with low oil shutdown Full cast iron two-stage pump for long service life W-style cylinder design for superior cooling Pump head made of FC35 Grade cast iron Floating-type Swedish steel valves deliver much longer valve life