Cummins Inc. Submits Second Engine For EPA Certification; Medium Duty Engine Offers Proven Performance & Reliability.

Business Editors

COLUMBUS, Ind.--(BUSINESS WIRE)--May 21, 2002

Cummins Inc. (NYSE:CUM) announced today that it has submitted its 5.9 liter ISB engine for certification to the Environmental Protection Agency's (EPA) 2.5-gram NOx+NMHC standard. Production will begin upon receipt of the certification, which is expected early this summer. Cummins began sending prototype engines to vehicle manufacturers over a year ago enabling them to test their installation processes and prove the engine's capability well ahead of the deadline.

"By submitting the application for certification early, we again demonstrate our commitment to delivering proven, reliable products to our customers." said Thomas Kieffer, Executive Director - Marketing at Cummins. "And customers will love this engine because they can maintain their maintenance intervals, have better performance and up to 2% better fuel economy."

The new ISB was introduced in Europe more than a year ago and is proving to be a performance and reliability leader. To meet the EPA emissions standard, a cooled exhaust gas recirculation (EGR) subsystem was added. In addition to the base engine experience in Europe, the new ISB with the cooled EGR subsystem will have more than one million field test miles by the time of production.

"The reputation of this product is excellent," said Kieffer. "We are looking forward to a successful launch in North America."

On April 2 Cummins announced that its ISX engine became the first engine certified to the new EPA standard. At that time the company stated that it would certify the ISB engine mid-summer, and the ISM engine prior to the October deadline. The company continues on its path to meet these commitments.

A global power leader, Cummins Inc. is a corporation of complementary business units that design, manufacture, distribute and service electrical power generation systems, engines and related technologies, including fuel systems, controls, air handling, filtration and emissions solutions. Headquartered in Columbus, Indiana (USA), Cummins serves its customers through more than 500 company-owned and independent distributor locations in 131 countries and territories. With 24,900 employees worldwide, Cummins reported sales of $5.7 billion in 2001. Press releases by fax may be requested by calling News on Demand (toll-free) at 888-329-2305. Cummins home page can be found at www.cummins.com.