Las Vegas (September 27, 2004) - Cummins Inc. (NYSE:CMI) unveiled the design for the QSK50 diesel engine for the mining market. This new engine will be available in 2006 and will meet the Environmental Protection Agency's (EPA) Tier 2 emissions requirements. The QSK50 is the evolution of the K2000E 50-liter platform, a mining industry benchmark.

The QSK50, rated from 1400 - 2100 hp (1044 - 1567 kW), was developed specifically to meet the durability, reliability and high power density requirements of large haul trucks and excavators.

"We've taken the mining performance benchmark of the K2000E and given it the Quantum treatment along with some evolutionary durability and reliability updates to bring it to Tier 2. Essentially, this is another example of Cummins investment in the right products and proven technology to help our customers achieve the uptime they require," said Jim Trueblood, Vice President of Cummins High Horsepower Engineering. "Cummins remains focused on providing engine platforms, customer support and technology to the mining market that are better than anybody else in the industry."

The Tier 2 QSK50 utilizes Cummins modular common-rail fuel system with full-authority electronic control over fuel timing, quantity, pressure, delivery rate shape and the number of injection events which provides optimum performance and emissions compliance.

Cummins Tier 2 QSK50 achieves a 30% reduction in emissions of Nitrogen Oxides (NOx) and over 65% reductions in Particulate Matter (PM) from Tier 1 standards, while maintaining reliability and durability in extreme operating environments and still allowing customers to use all widely available diesel fuels.

The modular common-rail fuel system is fully integrated with Cummins CM850 Electronic Control Modules (ECM) enabling the QSK50 to continually maintain 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 that ensures an unprecedented level of reliability in the extreme operating environments found at the mines around the world. The modular common-rail fuel lines also incorporate double wall protection for added safety.

The 50-liter, V16 configuration also features single-piece ferrous cast ductile (FCD) iron pistons that allow for high cylinder pressures and increased power output with exceptional durability while reducing maintenance costs. The Tier 2 QSK50 will be available for high-altitude mining applications featuring two-stage turbocharging.

Cummins engines will feature an in-cylinder emissions solution that ensures minimal OEM installation impact. Limiting installation impact is a real benefit to OEMs as it significantly minimizes any re-engineering of the machines. Cummins has been able to optimize the in-cylinder combustion system to meet Tier 2 NOx levels without increasing displacement or making significant configuration requirements. In addition, the Cummins Tier 2 advanced combustion solution provides a stable engine system that will carry customers through to Tier 4 in 2011 with the addition of aftertreatment.

The QSK50 is also available with uptime increasing options of CENTINEL™ and ELIMINATOR™. The CENTINEL™ Advanced Engine Oil Management System enables operators to extend oil change intervals to as much as 4,000 hours. The ELIMINATOR™ oil filtration system eliminates the need to replace and dispose of used oil filters and decreases lube system maintenance costs by as much as 90%.

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 vast 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.