New engines and packaging solutions deliver increased horsepower, reduced emissions and improved fuel economy without altering the vehicles

April 22, 2010 — APPLETON, Wis. — Pierce Manufacturing, an Oshkosh Corporation (NYSE:OSK) company, today announced the availability of a wide range of 2010 EPA compliant engines at the Fire Department Instructors Conference (FDIC) in Indianapolis, Ind. The new engines, featured at Pierce’s booth #8647, include models from both Detroit Diesel and Cummins.

“Providing a wide range of EPA 2010 compliant engine packages and proprietary emissions components that meet the needs of the fire and emergency industry is what Pierce accomplished; these engines deliver more power, improved fuel economy and far fewer emissions,” said Wilson Jones, Oshkosh Corporation executive vice president and president, Fire & Emergency. “Moreover, together with the engine manufacturers, Pierce engineers have developed optimal engine packaging solutions that achieve compliance without altering the vehicles in any meaningful way.”

The Detroit Diesel DD13 engine has demonstrated up to five percent better fuel economy than previous engines, while delivering up to 500 horsepower and 1650 ft-lbs of torque on demand.

The Cummins engines – from the ISC8.3 to the ISX15 fifteen liter (available summer 2010) – offer superior driving performance: improved fuel economy and emissions levels are reduced to near zero without sacrificing reliability or durability.

For both its Detroit Diesel and Cummins offerings, the Pierce solutions will be virtually transparent to most fire departments. The patent pending packaging solutions will not adversely affect wheelbase length, cab and compartment space, or choice of options on the vast majority of apparatus. Other than topping off a diesel exhaust fluid (DEF) tank on these engines, fire departments won’t be aware of their presence.

For more information on these new engines, visit www.piercemfg.com/2010-Ready.

About Pierce Manufacturing

Pierce Manufacturing Inc., an Oshkosh Corporation [NYSE: OSK] company, is the leading North American manufacturer of custom fire apparatus. Products include custom and commercial pumpers, aerials, rescue trucks, wildland trucks, minipumpers, elliptical tankers, and homeland security apparatus. In addition, Pierce designs its own foam systems and was the first company to introduce frontal airbags and the Side Roll Protection system to fire apparatus. To learn more about Pierce visit www.piercemfg.com.

About Oshkosh Corporation

Oshkosh Corporation 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 Corporation manufactures, distributes and services products under the brands of Oshkosh®, JLG®, Pierce®, McNeilus®, Medtec®, Jerr-Dan®, Oshkosh Specialty Vehicles, Frontline™, SMIT™, CON-E-CO®, London® and IMT®. The Oshkosh brands 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.

^®, ™ All brand names referred to in this news release are trademarks of Oshkosh Corporation or its subsidiary companies.

Forward-Looking Statements

This press release contains statements that the Company believes to be “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995.  All statements other than statements of historical fact, including, without limitation, statements regarding the Company’s future financial position, business strategy, targets, projected sales, costs, earnings, capital expenditures, debt levels and cash flows, and plans and objectives of management for future operations, are forward-looking statements.  When used in this press release, words such as “may,” “will,” “expect,” “intend,” “estimate,” “anticipate,” “believe,” “should,” “project” or “plan” or the negative thereof or variations thereon or similar terminology 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, which could cause actual results to differ materially from those expressed or implied by such forward-looking statements.  These factors include risks related to sustaining the required rate of production for the M-ATV contract and the amount, if any, of additional orders for M-ATVs that the Company may receive; the cyclical nature of the Company’s access equipment, commercial and fire & emergency markets, especially during a global recession and tight credit markets; the duration of the global recession, which could lead to additional impairment charges related to many of the Company’s intangible assets; the expected level and timing of U.S. Department of Defense procurement of products and services and funding thereof, risks related to reductions in government expenditures, the potential for the government to competitively bid the Company’s Army and Marine contracts and the uncertainty of government contracts generally; the consequences of financial leverage associated with the JLG acquisition, which could limit the Company’s ability to pursue various opportunities; risks related to the collectability of receivables during a recession, particularly for those businesses with exposure to construction markets; risks related to production delays as a result of the economy’s impact on the Company’s suppliers; the potential for commodity costs to rise sharply, including in a future economic recovery; risks associated with international operations and sales, including foreign currency fluctuations; and the potential for increased costs relating to compliance with changes in laws and regulations.  Additional information concerning these and other factors is contained in the Company’s filings with the Securities and Exchange Commission.  All forward-looking statements speak only as of the date of this press release.  The Company assumes no obligation, and disclaims any obligation, to update information contained in this press release. Investors should be aware that the Company may not update such information until the Company’s next quarterly earnings conference call, if at all.

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