5.7L Hemi Overhead Valve (OHV) V8 gasoline engine, rated as one of the world's top ten engines, is the optimized power for the Chrysler 3000C XComplies with Euro IV emission standards. HEM stands for hemispherical combustion chamber, where the intake valve is positioned opposite the exhaust valve, allowing gas to flow more smoothly through the combustion chamber, effectively improving intake efficiency, making the engine breathe more smoothly and generating greater power