Odessa, Texas (October 21, 2008) -

Cummins Inc. (NYSE:CMI) released a new rating for its Tier 2 QSK50 for well-servicing applications with a class-leading 2500 horsepower at the 2008 Permian Basin International Oil Show held in Odessa, Texas, October 21-23. This gives the QSK50 the best Tier 2 power-to-weight ratio in the 50- to 59-liter engine class. The QSK50 produces greater power from a smaller displacement and is lighter than the competition.

This power-to-weight ratio, 2500 hp from 12,566 lb (5,700 kg), is increasingly important as well-servicing equipment is often on trailers or rigs traveling on roads with local or regional weight restrictions.

The new rating for the Tier 2 QSK50 increases horsepower by 9 percent from 2300 hp to 2500 hp at 1900 rpm. This product is ideal for the durability, reliability and power density requirements of well-servicing applications.

"Cummins remains focused on providing engine ratings, platforms, customer support and technology to the oil and gas market that meet and exceed our customers’ needs," said Erik Drewry, Director of Cummins Oil and Gas Market. "With this new rating, we will ensure that our customers have greater ease of transporting equipment between sites regardless of highway regulations, and when the equipment is at the site it will have more power for fracing."

Cummins QSK50 has taken the legendary durability of the base 50-liter engine and enhanced it with the proven technology of Cummins Quantum System electronics and Modular Common Rail fuel system. These performance and technology upgrades ensure not only EPA Tier 2 emissions compliance, but also quieter operation, better fuel economy, smoother power delivery and better idle stability. QSK50 engines share 70 percent of their parts with their corresponding predecessors and, with a track record of over 1,000 50-liter engines produced annually, proven reliability is assured every time.

The QSK50 utilizes the Cummins Modular Common Rail fuel system, a design that enables precision control over fuel timing, quantity, pressure and delivery rate shape. This improves power delivery and cold-start performance, delivers smoother idling and emissions compliance, as well as dramatically reducing engine noise. Cummins has been able to optimize its in-cylinder combustion system to meet EPA Tier 2 Oxides of Nitrogen (NOx) and Particulate Matter (PM) levels without increasing displacement or making significant configuration changes, which means minimal installation impact.

The QSK50 features proven single-piece Ferrous Cast Ductile (FCD) pistons, allowing for a more than 10 percent increase in life-to-overhaul compared to the previous 50-liter platform.

Cummins has been able to retain the simplicity of its two-pump, two-loop cooling system on the Tier 2 QSK50 design, which allows for easier, more reliable and more cost-effective system package integration, avoiding the need for a more complex charge air cooling technology. In many cases, the customers of other Cummins products can use a common radiator package, which helps customers reduce installation and operating costs.

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 customers in approximately 190 countries and territories through a network of more than 500 company-owned and independent distributor locations and approximately 5,200 dealer locations. Cummins reported net income of $739 million on sales of $13.05 billion in 2007. Press releases can be found on the Web at cummins.com or everytime.cummins.com.