Product Name: Original Cummins Nta855 Piston Cooling Nozzle Spare Parts (3013591) Material: Iron Technics: Casting Standard Component: Standard Component Certification: ISO9001 Brand: Cummins Engine Model: Nta855 Warranty: 1 Year Trademark: cummins Transport Package: Standard Export Package Specification: CE, ISO Origin: China Product Description The diesel engine has the highest thermal efficiency (engine efficiency) of any practical internal or external combustion engine due to its very high expansion ratio and inherent lean burn which enables heat dissipation by the excess air. A small efficiency loss is also avoided compared to two-stroke non-direct-injection gasoline engines since unburned fuel is not present at valve overlap and therefore no fuel goes directly from the intake/injection to the exhaust. Low-speed diesel engines (as used in ships and other applications where overall engine weight is relatively unimportant) can have a thermal efficiency that exceeds 50%. warranty1 YEARDeliveryBy sea, by air, by expressPackage1, Neutral Packing2, As customer requirementFutures1, More rugged and reliable2 , High torque output hence pulling power is high3 , Gears are tall4 , Fuel efficiency is high5, Service requirement is less frequent