A modification package designed to increase the displacement of third-generation Chrysler Hemi engines. These packages typically include a crankshaft with a longer stroke, connecting rods, and pistons. The resultant increase in engine volume leads to enhanced torque and horsepower output.
The appeal stems from its ability to significantly improve engine performance without necessitating a complete engine replacement. The increased displacement provides gains across the RPM range, making it suitable for both street and racing applications. Historically, this type of modification has been a popular method for extracting greater power from internal combustion engines.