Cummins Hosts EPA Administrator for Introduction of Ultra-Low Sulfur Diesel.

-- New Diesel Fuel and Improved Engine Technologies to Result in Cleanest Diesel Engines Ever Starting in 2007 --

COLUMBUS, Ind. -- Cummins Inc. (NYSE:CMI) played host today as U.S. Environmental Protection Agency Administrator Stephen L. Johnson formally kicked off the nationwide switch to ultra-low sulfur diesel fuel (ULSD), which takes effect Oct. 15.

ULSD, which contains 97 percent less sulfur than previous diesel blends, is a critical component of efforts by Cummins and other diesel engine makers to meet stringent new EPA emissions regulations that go into effect Jan. 1, 2007.

Cummins Engine Business President Jim Kelly and Chief Technical Officer, Dr. John Wall led Administrator Johnson on a tour of Cummins test facilities, where the group received a first-hand look at work being done to prepare Cummins to meet the 2007 emissions standards.

Following the tour, Johnson, U.S. Rep. Mike Sodrel (9th District), American Petroleum Institute President Red Cavaney and the Cummins executives spoke about the importance of the new ULSD standards to a group of Cummins employees, industry representatives and the media.

"America's pumps are primed to deliver on President Bush's goal of clean diesel and cleaner air," said Johnson. "Over the last century, diesels have been our nation's economic workhorse - reliable, fuel efficient and long lasting.

"Today, through the President's investment in clean fuel technology, America's economic workhorse also is becoming America's environmental workhorse."

ULSD, when used in combination with emission-reduction technology being developed by Cummins and other engine makers, will result in on-highway diesel engines that produce 90 percent less particulate matter than today's engines and will greatly reduce emissions of nitrogen oxides (NOx), making these engines among the cleanest on the road. ULSD also works with any diesel engine and is expected to result in a 10 percent emissions reduction in older diesel-powered vehicles.

Lower sulfur levels in the fuel are crucial to achieving reduced emissions, because sulfur hinders exhaust-control devices in diesel engines, much like leaded gasoline once did in gas-powered vehicles. As a result of the new EPA regulations, it would take approximately 60 2007-compliant diesel-powered trucks to emit the amount of soot produced by a single truck made in 1988.

"We're delighted that the EPA chose Cummins as the location for this important announcement," said Kelly. "Cummins is prepared to meet the 2007 EPA standards, thanks to the hard work of our employees over the last several years, and the unprecedented level of collaboration with the EPA, Congress, the petroleum industry and many others.

"Achieving the new, lower emissions levels would not have been possible without ULSD. This cleaner fuel allows Cummins and others to produce engines that are capable of meeting the new standards without sacrificing performance and reliability."

Cummins 2007 product line will feature the Company's proven cooled-Exhaust Gas Recirculation (EGR) technology with the addition of an exhaust aftertreatment system. Exhaust aftertreatment for the majority of Cummins customers will be produced by Cummins Emissions Solutions.

Cooled-EGR was Cummins technology solution to meet the 2002 EPA standards, and customers have logged more than 30 billion miles on Cummins cooled-EGR engines over the past four years.

"Cummins has proven that its cooled-EGR technology offers the right balance of power, reliability, fuel economy and low emissions, and we're confident that our updated version of the technology will be a perfect fit again in 2007," Wall said. "The 2007 product line will be the cleanest engines we have ever produced, and will offer the quality and dependability that are synonymous with Cummins."

About Cummins

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 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 $550 million on sales of $9.9 billion in 2005. Press releases can be found on the Web at www.cummins.com.

Information provided and statements on the webcast and in this release that are not purely historical are forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, including statements regarding the company's expectations, hopes, beliefs and intentions on strategies regarding the future. It is important to note that the company's actual future results could differ materially from those projected in such forward-looking statements because of a number of factors, including, but not limited to, general economic, business and financing conditions, labor relations, governmental action, competitor pricing activity, expense volatility and other risks detailed from time to time in Cummins Securities and Exchange Commission filings.