Responding to the growing demand for IPS drives, Volvo Penta has now matched its Inboard Performance System to the new, 700 hp 11-liter engine with the IPS 900 system. The in-line six-cylinder engine connects to the forward-facing "tractor" drives via jack shafts. With a dual-engine setup, it's suitable for planing hulls up to 55 feet. A twin-entry turbocharger generates pulse charges. Those charges, combined with a mechanical compressor, produce torque at low rpm levels. The larger IPS drives and counter-rotating propellers give rapid acceleration, quicker response, increased fuel efficiency and range. Lower noise, vibration and exhaust fumes are also noticeable benefits of the IPS drives.