- NorthStar Gas-Powered Air Compressor - Honda GX160 OHV Engine, 8-Gallon Twin Tank, 13.7 CFM @ 90 PSI Honda GX160 OHV engine with low oil shutdown Full cast iron pump for long service life V-style cylinder design for superior cooling Pump head made of FC35 Grade cast iron Floating-type Swedish steel valves deliver much longer valve life