The ISB features a high-pressure common-rail fuel system. The constant flow of fuel produces quicker throttle response across every rpm. That means more power off the line, and faster acceleration on highway on-ramps. Constant injection pressures also help optimize timing for increased fuel efficiency and lower emissions.

Every ISB engine of 245 hp and above features a Variable Geometry Turbocharger from Holset that constantly adjusts airflow based on engine load, ambient pressure and other conditions. The result is improved response and stronger clutch engagement torque. This VG Turbo has a single sliding nozzle, eliminating dozens of parts and increasing dependability and durability.

The ISB not only delivers lower emissions, it also delivers increased fuel economy, every mile. Based on field test results, you can expect the ISB to deliver up to 2% better fuel economy than its predecessor. Cummins ISB makes every dollar go a little farther.

An unexpected benefit: This ISB not only runs faster on less fuel - it also runs up to 7 decibels quieter at idle. That's 80% less noise, inside and out. Something every driver can appreciate.