ISB.

The 24-valve ISB is a state-of-the-art design with cooled Exhaust Gas Recirculation that's better in every way. This B Series engine is improved in every measure of performance and reliability. It's faster from a standing start, over 50% quieter on the road, up to 80% quieter at idle than its predecessor, has improved fuel economy and meets the EPA's 2.5-gram NOx+NMHC emissions standard. Check out the ISB video testimonial and see for yourself just how well the ISB is performing.

Cummins ISB is the class leader in lowest cost of ownership. It lowers costs by going more miles between oil and filter changes. Its "easy service" design means maintenance gets done quicker.

Plus, every ISB engine 245 hp and above has a Variable Geometry Turbocharger, which includes standard exhaust braking at more than 150 braking horsepower for increased vehicle control and reduced service brake wear at every stop. Of course, an E Brake by Jacobs®* continues to be offered on every other rating.

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*	Jacobs is a registered trademark of Jacobs Vehicle Systems.