(http://media.il.edmunds-media.com/bmw/hurricane-gs-m5/ns/bmw_hurricane-gs-m5_f34_ns_11411_196.jpg) The G-Power Hurricane GS incorporates one fully sequential five-cylinder LPG system per cylinder bank and puts out 660 horsepower and 480 pound-feet of torque.
G-Power Hurricane GS: Ultra-Fast BMW M5 on LPG (http://www.insideline.com:80/bmw/m5/g-power-hurricane-gs-ultra-fast-bmw-m5-on-lpg.html)