The CAT C6.6 is a Six cylinder, turbocharged aftercooled engine that can produce between 85 and 205 bkW, or 119 to 275bhp. This means that this engine can also be fitted in a large range of machinery. These ranging from quarrying machinery such as crushers and screeners to more compact machinery like compressors and chippers. Being an inline six-cylinder engine, it can fit in machines that have narrow engine compartments, making it a very versatile engine.