A special conversion for the H1 and H2 Hummers, Duramax engines, allison Transmissions air bag suspension for H1 AND H2 HUMMERS.These Hummers get between 18 and 21 miles per gallon and produce up to 1220 lbs. of torque. Long range and built to run anywhere. A true road warrior. [PRWEB Jun 18, 2005]