Engine Model Cat® C18Gross Power (SAE J1995) 511 hpNet Power (SAE J1349) 496 hpEngine Power (ISO 14396) 504 hpBore 5.7 inStroke 7.2 inDisplacement 1,106 in³Note (1) Advertised power is tested at 1,700 rpm.Note (2) Advertised power is tested per the specified standard in effect at the time of manufacture.Note (3) The net power advertised is the power available at the flywheel when the engine is equipped with alternator, air cleaner, muffler and fan at minimum speed.Note (4) Net power when the fan is at maximum speed is 370 kW (496 hp) per the SAE reference conditions.Note (5) The Cat C18 meets U.S. EPA Tier 4 Final and EU Stage V emission standards.Note (6) Diesel exhaust fluid (DEF) used in Cat SCR systems must meet the requirements outlined in ISO 22,241-1:2,006. ISO 22,241-1:2,006 requirements are met by many brands of DEF, including those that carry the AdBlue® or API certifications.No Engine De-rating Required Below 10,000 ftPeak Engine Torque Gross (SAE J1995) 1,931 lbf·ftPeak Engine Torque Net (SAE J1349) 1,887 lbf·ftPeak Engine Torque Speed 1,200 r/min