LOUISVILLE, Ky. (November 29, 2006) - Cummins Inc. (NYSE:CMI) announced today the readiness of its on-highway engine product line for motorhomes, meeting the U.S. Environmental Protection Agency (EPA) and California Air Resources Board (CARB) emissions standards for 2007, during the RVIA (Recreation Vehicles Industry Association) show in Louisville, Ky.

Cummins product line for 2007 features a highly successful emissions- reduction approach. The engine line will be certified and compliant for 2007 with only incremental modifications from 2006. Cummins will continue to use its proven cooled Exhaust Gas Recirculation (cooled-EGR) technology with the addition of exhaust aftertreatment provided by the integrated Cummins Particulate Filter and a crankcase ventilation system. This technology is consistent on all Cummins on-highway diesel engines used in motorhomes throughout North America, including the ISX, ISM, ISL, ISC and ISB engines.

According to Mark Conover, Cummins Director - RV Business, "With 400,000 cooled-EGR engines on the road and over 40 billion miles of experience, we are confident in the customer advantages provided by our 2007 engines and emissions solution. Cummins is the only engine manufacturer with the key in-house technologies that enable the engine, air handling and aftertreatment system to be totally integrated for optimal reliability, durability, fuel efficiency and low cost of ownership."

Conover added, "Our 2007 field-testing has been very successful. Field tests have been jointly conducted with OEMs and end customers, so we are able to validate performance of the entire system in real-world conditions. Under all operating conditions, performance has been impressive."

The entire line features fully integrated electronic controls, with a single ECM (Electronic Control Module) that controls the engine and aftertreatment. All engines will use the patented sliding-nozzle Variable Geometry Turbocharger (VG Turbo) by Cummins Turbo Technologies, which features an electric actuator for 2007 with faster response and improved precision in adjusting airflow to the engine.

The Cummins Particulate Filter, designed and manufactured by Cummins Emission Solutions, includes a Diesel Oxidation Catalyst (DOC) and a diesel particulate filter to reduce particulate matter by 90 percent from current levels. The DOC fully optimizes the regeneration capability of the particulate filter, a critical aspect for maintaining fuel economy comparable to today's engines. The crankcase ventilation system made by Cummins Filtration features a coalescing filter, which captures and filters crankcase emissions and returns oil directly to the sump. It also eliminates any oil carryover from the engine.

Cummins readiness for 2007 also includes its distribution system for the entire RV engine product line, including all Coach Care facilities, which are dedicated solely to the maintenance and repair of RVs. Training and preparation for the Cummins-authorized OEM dealer network are well underway.

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.