Specifications include, but are not limited to: 2.1 Engine and Drivetrain 2.2 Engine: Cummins engine displacement shall be 540 cu in. and specifically designed to operate on compressed natural gas (CNG). Engine shall be rated at 320 horsepower and 1000 lb-ft. of torque. Engine manufacturer’s warranty shall cover all internally lubricated components, gaskets, seals, fuel system parts, and electronic engine management components for a period of not less than 5 years, 150,000 miles, or 4,500 hours whichever occurs first. Complete description of engine warranty shall be provided in bid package. 2.3 Starting: Engine starter shall be 12 volt with overcrank protection. 2.4 Batteries: Three (3) 12-volt, threaded post, absorbed glass mat (AGM) batteries providing the maximum available cold cranking amps (CCA) at 0o F. Jump start terminals shall be provided in a convenient location outside the battery enclosure. Battery enclosure shall include all available options to minimize corrosive damage to enclosure. A master battery disconnect shall be located on the outside of the battery enclosure with a pilot light indication of when the truck is energized. 2.5 Charging: Engine alternator shall have a rated output of not less than 200 amps.