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Oshkosh Defense and U.S. Marine Corps Demonstrate On-Board Vehicle Power Capabilities

OSHKOSH, Wis. — May 12, 2008 — Oshkosh Defense, a division of Oshkosh Corporation (NYSE:OSK), and the U.S. Marine Corps proved the capabilities of Oshkosh’s Medium Tactical Vehicle Replacement (MTVR) with on-board vehicle power (OBVP) during a recent demonstration at the U.S. Army’s Aberdeen Test Center.

At a time when modern military equipment drives a greater demand for electricity, yet mobility requirements also increase, the MTVR equipped with elements of Oshkosh’s proprietary ProPulse technology offers a considerable advantage with its exportable power capabilities.

The modified MTVR is equipped with enough exportable electrical energy to produce 21 kW of “power-on-the-move” for mobile command post shelters, communications and weapons systems. Stationary, the vehicle produces 120 kW of military-grade power, enough to power a small airport or city block.

“The MTVR with OBVP is an Office of Naval Research sponsored program that responded to the Marine Corps’ need for increased mobility, power for on-board weapons, back-up power for mission critical equipment, increased cargo space, reduced logistics footprint, and power options for early entry forces,” said Mike Mimnagh of the ONR.

“The MTVR with OBVP provides expeditionary forces like the Marine Corps with significant power generation without the need for cumbersome towed systems,” said Chris Kirby, director of Government Operations, Oshkosh Corporation. “It provides significant operational benefits for amphibious units constrained by lift assets, or for units engaged in distributed operations, and during humanitarian assistance operations.”

“The purpose of today’s demonstration was to meet with U.S. Army and Marine Corps to discuss the system’s test performance and validate requirements,” said Mike Gallagher, Program Manager, Expeditionary Power Systems, U.S. Marine Corps. “After seeing the MTVR with OBVP in action, we’re confident this system could greatly enhance the Marine Corps’ capabilities in Expeditionary Maneuver Warfare.”

The MTVR with OBVP is a diesel-electric drive system that delivers up to 20 percent more power than current systems without reducing mobility. The scaleable technology and components can be integrated to new or remanufactured fleets of light, medium and heavy vehicles.

Oshkosh was awarded the contract in 2006 after responding to a broad agency announcement seeking vehicles with the ability to provide the 60kw of exportable power required by Marine Corps mission planners. The Oshkosh OBVP system is capable of exporting twice as much power as the requirements specified in the original request from the ONR.

Oshkosh Defense, a division of Oshkosh Corp. leads the way in military trucks and armored wheeled vehicles. Since 1917, Oshkosh has continuously developed new products and technologies that make military jobs easier, safer and more efficient. Oshkosh Defense’s comprehensive product lines are recognized for superior performance and reliability, particularly in off-road environments. For more information, visit oshkoshdefense.com.

About Oshkosh Corp.

Oshkosh Corp. is a leading designer, manufacturer and marketer of a broad range of specialty access equipment, commercial, fire & emergency and military vehicles and vehicle bodies. Oshkosh Corp. manufactures, distributes and services products under the brands of Oshkosh®, JLG®, Pierce®, McNeilus®, Medtec®, Jerr-Dan®, BAI®, Oshkosh Specialty Vehicles, Frontline™, SMIT™, Geesink™, Norba™, Kiggen™, CON-E-CO®, London® and IMT®. Oshkosh products are valued worldwide in businesses where high quality, superior performance, rugged reliability and long-term value are paramount. For more information, log on to www.oshkoshcorporation.com.

Forward-Looking Statements

This press release contains statements that the Company believes are “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995. All statements other than statements of historical fact, including statements regarding the Company’s future financial position, business strategy, targets, projected sales, costs, earnings, capital spending and debt levels, and plans and objectives of management for future operations, are forward-looking statements. When used in this press release, words such as “expects,” “intends,” “estimates,” “anticipates,” or “believes” and similar expressions are generally intended to identify forward-looking statements. These forward-looking statements are not guarantees of future performance and are subject to risks, uncertainties, assumptions and other factors, some of which are beyond the Company’s control that could cause actual results to differ materially from those expressed or implied by such forward-looking statements. These factors include the cyclical nature of the Company’s access equipment, commercial and fire & emergency markets, especially during a recession, which many believe the U.S. economy has already entered; risks related to reductions in government expenditures and the uncertainty of government contracts; and the Company’s ability to turnaround its Geesink Norba Group business. Additional information concerning these and other factors is contained in the Company’s filings with the Securities and Exchange Commission.

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