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05/28/2015

STEMCO-ATDynamics Files Patent Infringement Claim Against Ridge Corporation

(LONGVIEW, TEXAS – May 28, 2015) STEMCO, an EnPro Industries company (NYSE: NPO), announced today that its subsidiary ATDynamics filed a Motion for Preliminary Injunction against Ridge Corporation in the United States District Court for the Central District of California on Tuesday, May 19, 2015. ATDynamics has asked the Court to enjoin Ridge Corporation from making or selling the Green Tail aerodynamic device on the basis that the Green Tail infringes at least 30 claims from STEMCO-ATDynamics’ extensive patent portfolio, including U.S. Patent Nos. 8,708,399, 8,360,510, 8,360,509, 8,272,680 and 7,850,224.

“We invest substantial resources into developing innovative and effective drag-reducing technologies for our customers,” said Bob Montgomery, Vice President of the Innovative Tire & Mileage Solutions Group for STEMCO. “We also invest in our patent portfolio. In seeking an injunction, we are protecting our intellectual property to ensure that we can continue to develop and offer the best possible products for the industry.”

STEMCO-ATDynamics has engaged Timothy Carroll and Kourtney Merrill of Perkins Coie to protect its intellectual property rights. Perkins Coie is one of the top ranked law firms in the country for patent law and patent litigation, was named Patent “Law Firm of the Year” for two consecutive years (2013, 2014) by U.S. News – Best Lawyers® and is routinely ranked as one of the most hired firms for patent litigation in the United States.

The action is Case No. 2:15-cv-01877-BRO-MAN (C.D. California).

With offices and manufacturing facilities in Texas, Georgia, Michigan, New York, Kentucky, Tennessee, Canada and China, STEMCO is a leader in the technology and manufacture of commercial vehicle wheel end, braking and suspension components, as well as intelligent transportation systems. STEMCO is an EnPro Industries, Inc. (NYSE: NPO) company. EnPro is a leader in the manufacture of sealing technologies and engineered products for use in critical applications by industries worldwide. For more information, visit the STEMCO website at www.stemco.com.

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