"GM 4X 4.3L - 70HP @ 1800 RPM (53HP Cont.@ 1800 RPM) - EPA Certified - Industrial Natural Gas - 4.3 Liter 6 Cylinder Power Unit Complete with: Electronic Fuel System, Radiator, Fan Guard, Radiator Hoses, Muffler/Catalyst, Air Cleaner, Front and Rear Engine Support Legs, Auto/Manual Start Control Panel with Key Switch, Safety Shutdown System, Throttle, Oil and Fuel Filters, 12 Volt Electrics, SAE 3"" Rear Housing/ SAE 11.5"" Flywheel, Owner's Manual, and Shop Tested."

"GM 5.7L - 98HP @ 1800 RPM (85HP Cont. @ 1800 RPM) - EPA Certified - Industrial Natural Gas - 5.7 Liter 8 Cylinder Power Unit Complete with: Electronic Fuel System, Radiator, Fan Guard, Radiator Hoses, Muffler/Catalyst, Air Cleaner, Front and Rear Engine Support Legs, Auto/Manual Start Control Panel with Key Switch, Safety Shutdown System, Throttle, Oil and Fuel Filters, 12 Volt Electrics, SAE 3"" Rear Housing/ SAE 11.5"" Flywheel, Owner's Manual, and Shop Tested."

"GM 8.8L - 146HP @ 1800 RPM (130HP Cont. @ 1800 RPM) - EPA Certified - Industrial Natural Gas - 8.8 Liter 8 Cylinder Power Unit Complete with: Electronic Fuel System, Radiator, Fan Guard, Radiator Hoses, Muffler/Catalyst, Air Cleaner, Front and Rear Engine Support Legs, Auto/Manual Start Control Panel with Key Switch, Safety Shutdown System, Throttle, Oil and Fuel Filters, 12 Volt Electrics, SAE 3"" Rear Housing/ SAE 11.5"" Flywheel, Owner's Manual, and Shop Tested."

"Zenith ZPP416 1.6L - 42.3HP @ 2400 RPM - EPA Certified - Industrial Gasoline/LPG/Natural Gas - 4 Cylinder Power Unit Complete with: Electronic Fuel System, Radiator, Fan Guard, Radiator Hoses, Muffler/Catalyst, Air Cleaner, Front and Rear Engine Support Legs, Auto/Manual Start Control Panel with Key Switch, Safety Shutdown System, Throttle, Oil and Fuel Filters, 12 Volt Electrics, SAE 5"" Rear Housing/ SAE 7.5"" Flywheel, Owner's Manual, and Shop Tested."

"Zenith ZPP6120 TA 12.0L - 429HP @ 1800 RPM - PRIME - EPA Certified - Industrial LPG/Natural Gas -TURBO CHARGED 6 Cylinder Power Unit Complete with: Electronic Fuel System, Radiator, Fan Guard, Radiator Hoses, Muffler/Catalyst, Air Cleaner, Front and Rear Engine Support Legs, Auto/Manual Start Control Panel with Key Switch, Safety Shutdown System, Throttle, Oil and Fuel Filters, 12 Volt Electrics, SAE 1"" Rear Housing/ SAE 14"" Flywheel, Owner's Manual, and Shop Tested."

"Zenith ZPP665 6.5L - 145HP @ 2300 RPM - PRIME - EPA Certified - Industrial LPG/Natural Gas - 6 Cylinder Power Unit Complete with: Electronic Fuel System, Radiator, Fan Guard, Radiator Hoses, Muffler/Catalyst, Air Cleaner, Front and Rear Engine Support Legs, Auto/Manual Start Control Panel with Key Switch, Safety Shutdown System, Throttle, Oil and Fuel Filters, 12 Volt Electrics, SAE 3"" Rear Housing/ SAE 11.5"" Flywheel, Owner's Manual, and Shop Tested."