NASHVILLE, Tenn. (September 23, 2007) - Cummins Inc. (NYSE:CMI) announced today that beginning January 1, 2008, all of its on-highway products will meet the California Air Resources Board's (CARB) new idle reduction regulation. The Cummins ISX, ISM, ISL, ISC and ISB engines will all be "Clean Idle" certified by generating very low NOx emissions at idle.


CARB established the more stringent standard to further reduce emissions by limiting idling of new and in-use diesel trucks, including those with sleeper berths. The new engine requirements apply to 2008 and subsequent model year diesel engines in trucks with a Gross Vehicle Weight Rating (GVWR) greater than 14,000 pounds and licensed for on-highway operation.


The new rule requires manufacturers to either have an automatic five-minute idle shutdown timer that is tamper-resistant and non-programmable or NOx idle emissions of 30 grams per hour or less. Cummins 2008 on-highway engines will have idle NOx emissions of less than 30 grams per hour and, therefore, will be allowed to idle indefinitely. Cummins believes an engine that is permitted to idle indefinitely will be preferred by customers, particularly the truckload and owner/operator segments which typically operate with a single driver that frequently depends on idling for cab climate control and to run appliances.


The new California regulation also requires Auxiliary Power Units (APU) such as Cummins ComfortGuard™ to have exhaust aftertreatment. Cummins ComfortGuard will offer two verified options: 1) a stand-alone particulate filter on the APU diesel engine or 2) a Cummins engine installation kit to route the APU diesel exhaust gas into the Cummins Particulate Filter.


According to Jeff Jones, Cummins Vice President, Sales and Market Communications, "Cummins clean idle approach is yet another example of Cummins innovative technology. It allows our customers to idle in California and still comply with the regulations. It also provides the flexibility for customers who infrequently need to idle more than five minutes."


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 $715 million on sales of $11.4 billion in 2006.