LOUISVILLE, Ky. (March 20, 2007) - Cummins Inc. (NYSE: CMI) today announced the release of its most powerful ISX in years, with 600 horsepower and 2050 lb-ft of torque. This new rating is designed for heavy-haul customers, fleets and owner/operators who specialize in expedited freight, and performance enthusiasts in the trucking industry.


Extra torque allows drivers to maintain road speed even on steep inclines, reducing the number of downshifts and fuel consumption. Maintaining a higher average road speed with less shifting also reduces driver fatigue and shortens trip time.


In addition to stronger pulling power, the ISX for 2007 also includes electric actuation on the patented VG Turbo, for improved engine response across the entire power range. The Intebrake™ system, an integrated compression brake that generates over 600 braking horsepower, continues as standard equipment.


Jeff Jones, Vice President - Sales and Market Communications, noted that "This rating has been developed to meet growing customer requests for extra pulling power. The fact that we've increased the torque on this engine and maintained exceptional fuel economy while meeting the 2007 emissions regulations with a single diesel particulate filter and turbocharger shows the true benefit of our integrated design and manufacturing capabilities. It is a testimony to the advanced thinking and visionary design of the ISX."


Manufactured in the United States in Jamestown, New York, the Cummins ISX remains the only Heavy-Duty diesel engine built with dual overhead camshafts and an integrated engine brake as standard equipment. The ISX 600 with 2050 lb-ft peak toque is scheduled to become available in the fall of 2007.


Cummins Inc., a global power leader, is a corporation of complementary business units that design, manufacture, distribute and service engines and related technologies, including fuel systems. Headquartered in Columbus, Indiana (USA), Cummins serves customers in more than 160 countries through its network of 550 company-owned and independent distributor facilities and more than 5,000 dealer locations. Cummins reported net income of $715 million on sales of $11.4 billion in 2006.