Houston, Tx. (May 3, 2004) - Cummins Inc. (NYSE:CMI) announced that its next generation QSK19 engine achieves Tier 3 engine emissions standards for the oil and gas market. The proven dependability of the 19-liter, 500 to 700 HP platform meets Tier 3 by incorporating new combustion technology and a common rail fuel injection system. This way Cummins is able to reduce emissions and maintain low installation costs. The Tier 3-compliant QSK19 maintains the same basic footprint as the existing engine and will be available in January 2005.

"As a result of Cummins in-cylinder advanced combustion technology and new high pressure common rail fuel system, the QSK19 moves forward to Tier 3 by reducing NOx (Oxides of Nitrogen) emissions levels by almost 40 per cent, without the use of aftertreatment or other hardware," said Mark Levett, Vice-President & General Manager of Cummins High Horsepower Business. "The QSK19 has been designed from the start for demanding high hour, high load factor applications and is an excellent choice for draw works, cementing, fracturing, mud pumps, blending and acidizing. The QSK19 operates in a wide range of industrial applications. Dependability proven through use in mining haul trucks, excavators, and drills demonstrates that it surpasses any other equivalent engine in terms of durability or uptime."

The common rail fuel system incorporated into the latest QSK19 is designed specifically for engines operating in rigorous high hour, high load factor applications. With the common rail system, maintaining peak injection pressure is not dependent on engine speed or fueling capability. Injection pressure can be virtually constant realizing greater flexibility and precision in controlling both injection rates and timing. Under low loads the availability of constant pressure means that high injection pressures can be maintained with a more effective fuel injection spray pattern. Correspondingly, the system also reacts more rapidly to sharp increases in load demands with smooth power delivery.

The common rail fuel system is fully integrated with an upgraded CM850 electronic control module (ECM) with double the processing speed as the ECM it replaces. The QSK19 continually maintains an optimum balance between load demands, fuel-efficiency, and emissions control.

The new CM850 ECM is designed for isolation from detrimental thermal and vibration loading. Fuel lines also incorporate double wall protection for added safety.

The OEM and operator interface with the engine management system is made easy using the latest QuickCheck™ III hand-held datalink providing instant diagnostics, fuel-efficiency data and multiple engine reports.

The QSK19 engine is backed by Cummins industry-leading QuickServe program. Cummins QuickServe offers factory-certified technicians, the most sophisticated diagnostic and repair tools in the industry and the largest international parts and service network of any engine manufacturer.

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, controls, air handling, filtration, emission solutions and electrical power generation systems. Headquartered in Columbus, Indiana (USA), Cummins serves its customers through more than 680 company-owned and independent distributor locations in 137 countries and territories. Cummins also provides service through a dealer network of more than 5,000 facilities in 197 countries. With more than 24,000 employees worldwide, Cummins reported sales of $6.3 billion in 2003. Press releases can be found by accessing the Cummins home page at www.cummins.com.