LISLE, Ill. – May 9, 2013 – IC Bus today announced it won a bid to deliver 300 CE Series school buses to Columbus City Schools in Columbus, Ohio. IC Bus will deliver the buses through its IC Bus dealer, Rush Bus Centers, in Columbus, Ohio.

“IC Bus is proud to partner with Columbus City Schools and we look forward to helping them with their student transportation needs for the next school year,” said John McKinney, president, IC Bus. “Furthermore this recent order demonstrates our customers’ continued confidence in our products as well as acknowledges the unmatched support provided by the industry's strongest dealer network.”

The CE Series buses for Columbus City Schools will be powered by MaxxForce^® 7 engines and seat 65 passengers. The buses’ 16-gauge steel side sheets and 19,800-lb. rear axle with a 21,000-lb. air ride suspension improve safety while providing drivers with a smooth ride.

The buses will be built at the IC Bus assembly plant in Tulsa, Oklahoma. Deliveries will begin in July 2013.

“We are honored that Columbus City Schools has confidence in us to provide our unparalleled customer support for their fleet of IC Bus vehicles as they safely transport the city’s children,” said Rusty Rush, president and chief executive officer, Rush Enterprises, Inc. “The school district will benefit from our exceptional service catered around their needs.”

About IC Bus

IC Bus, LLC of Lisle, Ill., is a wholly-owned subsidiary of Navistar, Inc. (NYSE: NAV). The nation's largest integrated manufacturer of school buses, IC Bus is a global leader in passenger protection, chassis design, engines and ergonomics. The company is also a producer of commercial buses. All IC Bus™ buses are sold, serviced and supported through a renowned dealer network that offers an integrated customer program encompassing parts, training and service. Additional information is available at www.icbus.com.

About Rush Enterprises, Inc.

Rush Enterprises, Inc. is the premier service provider to the commercial vehicle industry and owns and operates the largest network of commercial vehicle dealerships in the United States, representing truck and bus manufacturers, including International and IC Bus.   The Company's network of vehicle centers are strategically located in high traffic areas on or near major highways in 15 states throughout the United States. These one-stop centers offer an integrated approach to meeting customer needs — from sales of new and used vehicles to aftermarket parts, service and body shop operations plus a wide array of financial services, including financing, insurance, leasing and rental. Rush Enterprises' operations also provide vehicle up-fitting, chrome accessories and tires. For more information, please visit www.rushenterprises.com.

About Navistar

Navistar International Corporation (NYSE: NAV) is a holding company whose subsidiaries and affiliates produce International^® brand commercial and military trucks, MaxxForce^® brand diesel engines and IC Bus^™ brand school and commercial buses. A subsidiary of the company also provides truck and diesel engine service parts. Another affiliate offers financing services. Additional information is available at www.navistar.com/newsroom.

Navistar Media Contact: Elissa Koc, 331-332-2669

Navistar Investor Contact: Heather Kos, 331-332-2406

Rush Enterprises Media Contact: Karen Konecny, 830-626-5102